Full current balancing method of state of charge for energy storage system
US11855465B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2023 |
| Grant date | Dec 26, 2023 |
| Priority date | — |
| Expiry date | May 10, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0031
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A full current balancing method of SOC for an energy storage system is provided. DC output terminals of each battery pack are connected in parallel with a half-bridge control circuit to form a battery module, positive and negative electrodes of battery modules are successively connected in series to form a battery cluster. In operation, SOCs of the battery modules are sorted, battery modules with lower SOCs are put in operation first when charging, and the battery modules with higher SOCs are put in operation first when discharging, thereby achieving full current balancing of SOC among the battery packs in the battery cluster. After multiple battery clusters are connected in parallel to form a battery stack, current of the battery cluster with a low SOC is increased, and current of the battery cluster with a high SOC is decreased, thereby achieving balancing of SOC among the battery clusters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.