Vehicle battery diagnosis apparatus, battery diagnosis method thereof, and vehicle including vehicle battery diagnosis apparatus
US11407328B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 11, 2019 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Apr 5, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vehicle battery diagnosis apparatus includes: a measurement unit configured to measure a battery cell voltage; and a controller configured to diagnose a cell voltage deviation based on the battery cell voltage. The controller calculates a self-discharge rate for each cell based on the battery cell voltage and a parking time and calculates the cell voltage deviation based on the battery cell voltage, and when the calculated cell voltage deviation is greater than a preset cell balancing reference voltage deviation, the controller compares cell balancing capacitance calculated based on a vehicle usage time with a maximum self-discharge rate among the calculated self-discharge rates for respective cells and determines whether cell balancing is enabled or diagnoses the cell voltage deviation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.