US 12,424,862 B2
Methods of managing the power requirements of off-grid assemblies and off-grid assemblies employing such
Michael Guy Faram, Clevedon (GB); Owen William Pearson, Clevedon (GB); Timothy Charles Brookes, Clevedon (GB); and Christopher Alan Williams, Clevedon (GB)
Assigned to PROLECTRIC SERVICES LTD, North Somerset (GB)
Appl. No. 18/027,452
Filed by Prolectric Services Ltd, Clevedon (GB)
PCT Filed Sep. 22, 2021, PCT No. PCT/EP2021/076115
§ 371(c)(1), (2) Date Mar. 21, 2023,
PCT Pub. No. WO2022/063855, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 2014959 (GB), filed on Sep. 22, 2020.
Prior Publication US 2023/0336012 A1, Oct. 19, 2023
Int. Cl. H02J 7/35 (2006.01); H02J 3/00 (2006.01); H02J 7/00 (2006.01); H05B 47/16 (2020.01)
CPC H02J 7/0048 (2020.01) [H02J 3/003 (2020.01); H02J 3/004 (2020.01); H02J 7/0071 (2020.01); H02J 7/007182 (2020.01); H02J 7/35 (2013.01); H05B 47/16 (2020.01)] 19 Claims
OG exemplary drawing
 
1. A method of managing the power requirements of an off-grid floodlight assembly that has one or more light modules powered by an energy storage device, said method comprising:
a) determining the current state of charge of the energy storage device and recording such, where the state of charge is determined by either:
i) following a change in charge supply and/or charge demand experienced by the energy storage device, waiting for a voltage of the energy storage device to stabilise before measuring both the voltage of the energy storage device and a load power of the light modules while the light modules are applying a load to the energy storage device, and using the stabilised measurements taken to determine the state of charge of the energy storage device; or
ii) using the difference between charge input and charge output of the energy storage device to calculate any change in the state of charge since the state of charge was last determined using stabilised measurements in accordance with step i) to determine the state of charge of the energy storage device;
b) comparing the current state of charge determined in step a) with a calculated power requirement for providing illumination over at least one required lighting period, wherein said required lighting period is determined taking into account the prevailing dawn and dusk times for the region in which the off-grid floodlight assembly is deployed;
c) managing the level of power supplied by the energy storage device to the light modules in accordance with a power rationing model, wherein said power rationing model comprises instructions to vary the power supplied over time to ensure delivery of illumination throughout the required lighting period or periods.