Systems and apparatus of cyclic coulometry
US10705152B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2019 |
| Grant date | Jul 7, 2020 |
| Priority date | — |
| Expiry date | Jun 5, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/385
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems, devices, and methods of diagnosing an electrochemical cell using cyclic coulometry are discussed. An exemplary battery diagnostic system comprises a current generator to generate symmetric charge current and discharge current to excite an electrochemical cell, and a cyclic coulometer to evaluate performance of the electrochemical cell. The cyclic coulometer can adjust at least one of a charge time for applying the charge current, or a discharge time for applying the discharge current, to keep a monitored cell voltage toward a specific setpoint. The adjustment of charge or discharge time can be achieved by changing a current switch timing for reversing current from a first to a second current direction. The cyclic coulometer measures one or more electrical parameters during the charge or discharge cycle, and generates a performance metric using the measured electrical parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.