Electric charging method for a vehicle and electric vehicle charging device
US9744857B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2015 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Aug 31, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system and method for charging a vehicle having a first battery, such as a high-voltage traction battery, and a second battery, such as a low-voltage battery, include controlling a DC converter or relay to effectively decouple the second battery from the converter when the vehicle is connected to an external power source to reduce or prevent damage to the second battery from extended or prolonged charging. The second battery may be effectively decoupled from the converter by controlling the relay or converter voltage based on state of charge of the second battery so that substantially zero current flows to and from the second battery relative to the converter and any vehicle low voltage consumers/accessories.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.