Apparatus and method for testing rechargeable energy storage batteries
US6441585B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2000 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Jun 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/389
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved battery testing system and method is disclosed. The system measures an open circuit voltage and a dynamic parameter of a test battery, and uses those measurements, along with correlation data stored in memory, to determine a physical condition and/or charge state of the battery. The measured dynamic parameter may be scaled based on the rating of the test battery. Also, a high current load pulse may be applied to the test battery and a wait period implemented before the open circuit voltage is measured. In addition, the charge state may be determined from a state of charge value, and categorized into one of several charge state ranges. In one embodiment, the state of charge value is determined from the relative distance along a curve, represented by the correlation data stored in memory, that the measured open circuit voltage is not greater than or equal to such correlation data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.