Methods and systems for in-situ impedance spectroscopy analysis of battery cells in multi-cell battery packs
US12352715B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2023 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | May 12, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Described methods and systems are used for in-situ impedance spectroscopy analysis of battery cells in multi-cell battery packs. Specifically, the cell impedances are determined while the pack continues to operate, such as being charged or discharged. For example, the pack voltage/power output remains unchanged while this analysis is initiated, performed, and ended. Cell impedance is determined based on the cell's response to the signal applied to the cell. For example, a current through the cell is charged while monitoring cells' voltage response. Although the power output of the changes during this testing, but the operation of the pack is not impacted due to the power compensation provided by one or more other cells in the pack thereby ensuring uninterrupted operation of the pack. This in situ testing is provided by the unique architecture of the pack, comprising multiple nodes and individual node controllers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.