Solid-state battery management using real-time estimation of nano material electrical characteristics
US9393921B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2015 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Apr 13, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3842
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Set forth herein are methods and systems for determining a rechargeable (i.e., secondary) battery's capability in real time, including how much power and energy can be discharged or charged, by compensating for the limitations of the standard battery model for cathode electron and ion transport restrictions in a solid-state battery. Set forth herein is also an equivalent circuit for each layer of a layered cathode (i.e., positive electrode) which is created using resistive, capacitive, and storage elements, including a state-of-charge (SOC) state variable and an SOC-dependent voltage source. In some embodiments, each layer is connected to adjoining layers using resistive elements to model ion and electron transport. In some embodiments, bulk ohmic resistance and ion exchange external to the electrode is represented using a Randles cell equivalent circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.