Battery powered device with pre-powered circuit
US10923943B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2018 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Dec 16, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery powered device includes a battery pack, at least one switch, a power management chip, and a pre-powered circuit. The pre-powered circuit comprises a buck and current-limiting module. The buck and current-limiting module comprises at least one zener diode and at least one current-limiting resistor. When the switch is turned off, the battery pack will be powered to a system device by the pre-powered circuit. Thus, the battery pack can be powered to the system device by the pre-powered circuit even if the battery powered device is operated in a standby mode. Besides, the power management chip can be operated in the standby state when the battery powered device is powered by the pre-powered circuit, so as to reduce the consumption of the battery energy and therefore extend the powered time of the battery powered device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.