LED lighting system with battery for demand management and emergency lighting

Patent metadata

Field	Value
Publication number	US-10333341-B2
Application number	US-201715453772-A
Country	US
Kind code	B2
Filing date	Mar 8, 2017
Priority date	Mar 8, 2016
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

This disclosure describes systems, methods, and apparatus for a combined LED driver and emergency backup battery system. The LED driver can include current regulation circuitry as well as a bus enabling charging and discharging of an energy storage device from and to the bus. A master controller can control charging and discharging of the energy storage device via a controller of an energy storage management system, and also communicate with the current regulation circuitry to control a balance of power between an AC mains, the energy storage device, and driving of an LED light source. Accessories may be coupled to the bus and receive low voltage power from the bus and optionally receive commands from the master controller and provide sensed data back to the controller. A wireless network interface to the master controller can enable system states based on electrical power company indications and instructions.

First claim

What is claimed is:

1. An LED driver system having a backup energy source, the system comprising:
a first AC mains input configured for coupling to an AC mains power source;
a voltage regulation circuit coupled to the AC mains input and receiving AC or rectified AC power, the voltage regulation circuit having one or more bus coupling I/Os;
a voltage to current converter circuit having one or more bus coupling I/Os and a regulated current output configured to drive a light source comprising one or more light emitting diodes;
an energy storage management system coupled to a removable energy storage device and having one or more bus coupling I/Os, the energy storage management system comprising:
a converter controlling a voltage on the energy storage device and charging and discharging rates of the energy storage device; and
a controller controlling the converter, the controller also receiving feedback from the converter,
wherein the voltage regulator circuit and the voltage to current converter circuit each comprise a controller, and wherein the combination of these two controllers is programmed, coded, or wired to receive AC power from the AC mains power source and convert this to a regulated current for driving the light source when the energy storage management system is decoupled from the system;

a bus having at least data and power channels, wherein the energy storage management system, the voltage regulator circuit, and the voltage to current converter circuit are all coupled to the bus; wherein
the voltage regulation circuit or the voltage to current converter circuit comprises a master controller and the master controller controls the controller of the energy storage management system as well as a controller of whichever of the voltage regulation circuit or the voltage to current converter does not comprise the master controller; and wherein
the master controller is programmed, coded, or wired to control:
driving the light source from a simultaneous combination of the energy storage device and the AC mains power source;
simultaneous charging the energy storage device and driving the light source from the AC mains power source; and
driving the light source from the energy storage device when the AC mains power source is not available.

2. The system of claim 1 , wherein the bus includes a data channel, a low voltage channel, and a high voltage channel, where the data channel transfers instructions from the master controller to the controller of the energy storage management system as well as a controller of whichever of the voltage regulation circuit or the voltage to current converter does not comprise the master controller, where the high voltage channel is regulated to between 20V-50V, and wherein the low voltage channel is regulated to below 20V.

3. The system of claim 1 , wherein the master controller includes a wireless network interface and a network connection to an electrical power company.

4. The system of claim 3 , wherein the master controller adjusts a balance of power sourced from the AC mains power source and the energy storage device, or a balance of power AC mains power distribution between charging the energy storage device and driving the light source, the adjusting being in response to data from the electrical power company.

5. The system of claim 4 , wherein the data is electricity pricing.

6. The system of claim 1 , further comprising an optical sensor arranged proximal to the light source and coupled to the master controller to provide luminosity feedback from the light source or maintaining a consistent light source output.

7. The system of claim 1 , wherein one of the two controllers is the master controller.

8. The system of claim 1 , further comprising an accessory coupled to the bus and receiving power from the bus.

9. The system of claim 8 , wherein the accessory also receives instructions from the master controller via the bus.

10. The system of claim 9 , wherein the accessory includes a sensor and provides sensor data from the sensor to the master controller via the bus.

11. A method of operating a light emitting diode (LED) driver system comprising:
providing an LED driver generating a regulated LED current to a light source comprising one or more LEDs, where the LED driver includes an energy storage device, and a bus, the bus coupling a voltage regulator circuit, a voltage to current converter, and an energy storage management system, where a master controller of either the voltage regulator circuit or the voltage to current converter, controls (1) the bus, (2) the charging or discharging of the energy storage device, and (3) the regulated LED current;
monitoring power from an AC mains power source;
monitoring wireless signals from an electrical power company; and
when the AC mains power source is available:
driving the light source with power simultaneously derived from the energy storage device and the AC mains power source; or
driving the light source and charging the energy storage device, both simultaneously derived from the AC mains power source; and

when the AC mains power source is not available:
driving the light source with power derived entirely from the energy storage device.

12. The method of claim 11 , wherein the master controller performs the first and second monitoring and the first, second, and third driving.

13. The method of claim 11 , wherein the energy storage management system charges and discharges the energy storage device so as to improve a lifetime of the energy storage device while also reducing a power draw from the AC mains power source, as instructed by the master controller, when electricity pricing is higher than a threshold or higher than an average.

14. The method of claim 11 , further comprising monitoring optical feedback from an optical sensor arranged proximal to the light source and adjusting the ratio of power drawn from the AC mains power source and the energy storage device to maintain a constant luminosity from the light source.

15. The method of claim 11 , further comprising coupling an accessory to the bus and powering the accessory via a low voltage channel of the bus.

16. The method of claim 15 , further comprising passing instructions from the master controller to the accessory via a data channel of the bus.

17. The method of claim 16 , further comprising passing sensor data from the accessory to the master controller via the data channel of the bus.

18. A light emitting diode (LED) driver system having a backup energy source, the system comprising:
a voltage regulation circuit configured to convert DC power to a regulated bus voltage and having one or more bus coupling I/Os;
a voltage to current converter circuit having one or more bus coupling I/Os and a regulated current output, and configured to convert the bus voltage to a regulated current, the regulated current output configured to couple to a light source comprising one or more LEDs, the regulated current configured to drive the light source;
a master controller coupled to the voltage to current converter, the voltage regulation circuit, or both;
an energy storage management system coupled to a removable energy storage device and having one or more bus coupling I/Os, the energy storage management system comprising:
a converter coupled between the one or more bus coupling I/Os of the energy storage management system and the energy storage device; and
a controller controlling the converter;

a bus having at least data and power channels, the energy storage management system, the voltage

Assignees

• Ledvance Llc

Inventors

• Catalano Anthony W
• Davis Steven S
• Teplin Charles
• Mcdougle Anthony N

Classifications

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• H05B45/10

  Controlling the intensity of the light · CPC title

• H05B47/19

  via wireless transmission · CPC title

• H02J7/90

  Regulation of charging or discharging current or voltage · CPC title

• H02J7/04

  Regulation of charging current or voltage · CPC title