Backup power system and method
Granted patent · Japan · publication JP5303577B2
Overview
A backup power system that protects sensitive electronics during intermittent power outages using a dual-threshold strategy. When the main power grid experiences brief interruptions followed by quick recovery—repeated multiple times—conventional systems cycle generators on and off wastefully and drain battery reserves. This system avoids that problem by monitoring stored energy against two thresholds: the lower threshold ensures the backup generator has enough battery reserve to reach full output, while the higher threshold prevents unnecessary generator cycling during brief fluctuations. A controller selectively supplies power from the main grid, backup generator, or stored energy based on these thresholds, providing continuous protection without the equipment stress and battery depletion of systems that react to every dip in grid power.
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Other jurisdictions claiming the same priority date. Each has its own dossier on this site.
| Publication | Jurisdiction | Kind | Date | Status |
|---|---|---|---|---|
| AU2009212260B2 | Australia | Granted patent | 2008-02-07 | active |
| CA2715358C | Canada | Granted patent | 2008-02-07 | active |
| EP2240993B1 | European Patent Office | Granted patent | 2008-02-07 | active |
| IL207392A | Israel | Granted patent | 2008-02-07 | active |
| US20090204838A1 | United States | Published application | 2009-08-13 | expired |
| WO2009100295A2 | WIPO (PCT) | WIPO publication | 2009-08-13 | expired |
| US20100235671A9 | United States | Published application | 2010-09-16 | expired |
| US7962772B2 | United States | Granted patent | 2011-06-14 | active |
| HK1149857B | Hong Kong | Granted patent | 2019-08-09 | active |