Capacity maintenance rate estimation apparatus or capacity maintenance rate estimation method
US10634724B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2015 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Nov 20, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capacity ratio estimation apparatus and method for a battery detects current and voltage of the battery; specifies an integration period from a first time point to a second time point and calculates an integration value of the current for the integration period based on detected current; calculates a first open circuit voltage at the first time point based on the detected voltage and calculates a second open circuit voltage of the battery at the second time point based on the detected voltage; and estimates a capacity ratio of the battery based on a voltage difference between the first open circuit voltage and the second open circuit voltage and an integration value satisfying predetermined conditions. The integration value is equal to a predetermined lower limit value or greater and an average value of the current of the battery for the integration period is equal to the predetermined value or greater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.