Energy storage system
US12320320B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2022 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Dec 19, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/16
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An energy storage system includes a vessel for storing water, an energy conversion device, and a connection line connecting the vessel with the energy conversion device. The energy conversion device includes first and second housings, a pump turbine in the first housing, and a motor generator in the second housing. The pump turbine includes a first shaft and an impeller mounted on the first shaft. The motor generator includes a second shaft and a rotor at the second shaft for rotating relative to a stator. The second shaft is coupled to the first shaft for transmitting torque between the first and second shafts. The connecting line connects a low pressure opening with an opening for receiving water or discharging water. The second housing is filled with a gas for a barrier pressure during operation of the energy conversion device, such that the rotor rotates within the gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.