Method for determining battery state and battery state determination device
US12416677B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2021 |
| Grant date | Sep 16, 2025 |
| Priority date | — |
| Expiry date | Jun 5, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/388
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining a negative electrode capacity of a rechargeable battery is performed by a measurement device that includes a voltage detector that detects a voltage value of the rechargeable battery, a current detector that detects a current value of the rechargeable battery, and a state of charge detector that detects a state of charge of the rechargeable battery. The method includes calculating an absolute value of a voltage slope indicating a voltage change amount with respect to a discharge amount when the state of charge of the rechargeable battery is less than 40%, comparing the absolute value of the voltage slope with a preset lower limit, and determining that the negative electrode capacity of the rechargeable battery has decreased when the absolute value of the voltage slope is less than or equal to the lower limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.