×

Power over ethernet lighting system with battery charge control algorithm

  • US 10,085,326 B2
  • Filed: 03/30/2018
  • Issued: 09/25/2018
  • Est. Priority Date: 09/28/2016
  • Status: Active Grant
First Claim
Patent Images

1. A power over ethernet lighting system comprising:

  • a power/communication bus;

    a plurality of nodes electrically connected to the power/communication bus with a PoE interface, and each of the nodes being electrically connected to a PoE luminaire;

    each of the plurality of nodes including the PoE interface, a micro-controller, and a driver electrically connected to the PoE luminaire;

    at least one of the nodes is an emergency management node that includes a rechargeable battery and a PoE battery charger, and the micro-controller is electrically connected to the rechargeable battery;

    wherein the system has a maintained mode in which the PoE luminaire of each of the nodes, including the emergency management node, is powered by electricity from the power/communication bus as controlled by the respective micro-controller, which is powered by one of the power/communication bus and the rechargeable battery;

    wherein the system has an emergency mode characterized by a power loss on the power/communication bus, and the PoE luminaire of the emergency management node is powered by electricity from the rechargeable battery as controlled by the respective micro-controller, which is powered by the rechargeable battery;

    wherein the emergency management node includes a charge sensor operably coupled to the battery and in communication with the respective micro-controller; and

    the micro-controller of the emergency management node includes a charge control algorithm configured to determine a charge level of the battery based on a signal from the charge sensor, and configured to dynamically adjust an allocation of power to the PoE battery charger responsive to the charge level.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×