Systems for controlling charging of electrical devices
US12316146B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2021 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Jul 6, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00714
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charger prevents charging of a wearable device battery when sweat or another conductive contaminant is present. The charger initially provides a low voltage to detect when the wearable device is engaged. When the wearable device is engaged, a measured current value exceeds a threshold minimum value. If sweat or another conductive contaminant is present, the additional conductive pathway provided by the contaminant will cause the measured value to exceed a threshold maximum, and charging of the battery is prevented. If a contaminant is not present, the measured value will be greater than the threshold minimum and less than the threshold maximum. A higher voltage may then be provided to charge the battery. When the device is removed from the charger, the measured value will decrease below the threshold minimum and the charger may return to providing low voltage to detect engagement of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.