Apparatus and method for simulating a battery tester with a fixed resistance load
US7116109B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 11, 2003 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | May 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/379
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for simulating a battery tester with a fixed resistance load, such as a widely used Japanese load tester that rates the strength of Japanese batteries that are categorized under the Japanese Industrial Standard (JIS), are provided. This invention simulates such a device without invoking large current loads, yields familiar results, utilizes an existing database and provides more conclusive testing. The method includes measuring an open circuit voltage (OCV), temperature and a dynamic parameter of the battery. A load voltage of the battery is estimated as a function of the measured battery dynamic parameter, the OCV, the load resistance value of the load tester and the battery temperature. A bounceback voltage (BBV) of the battery is then predicted. The BBV, the load voltage and the battery temperature are utilized to rate the strength of the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.