US Patent 11870298 Traffic signal battery backup system

A traffic signal back-up system assembly is provided for supplying traffic signals and other traffic control devices with electrical energy if the primary supply of electrical energy from the utility company is interrupted or disconnected. With the use of a lithium-ion battery bank, this assembly can store enough electrical energy to power a traffic signal for several days without restoration of the primary source of electrical energy. This assembly can be installed inside, on, or apart from the traffic signal control box as needed.