State of charge detection device
US10429444B2 · kind B2 · utility
2Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2012 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | Mar 25, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention pertains to the detection of the state of charge of a battery, whereby the complex impedance in the diffusion region of the battery is used. An arithmetic device such as a computer determines the slope of the complex impedance at least two different frequencies in the diffusion region of a rechargeable battery when a straight-line approximation has been made. The state of charge of the rechargeable battery is detected by using the slope that has been determined, and the relationship between the state of charge and slopes that have been stored in advance in a storage means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.