Electric vehicle propulsion system and batteries therefor
US5819187A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | May 28, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An initial output of a secondary battery on an electrically propelled vehicle is set to a value which is at least the sum of an established power output of a motor, an output reduction due to the memory effect of the secondary battery, and an allowable output reduction due to aging of the secondary battery. Since the established power output of the motor is determined taking into account the output reduction due to the memory effect and the output deterioration due to the aging, a minimum power output which the battery has as its capability is prevented from dropping below the established power output within the prescribed number t=n of times that the battery is charged and discharged, even when the output reduction and deterioration take place. Therefore, the driver, which is the user of the electrically propelled vehicle, does not feel a reduction in the power performance of the electrically propelled vehicle, i.e., a reduction in the established power output of the motor, caused by the output reductions of the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.