On-board charging/discharging system and control method thereof
US11101737B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2019 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Apr 13, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0058
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An on-board charging/discharging system includes a bidirectional converter and a low-voltage converter. When the high-voltage battery is charged or discharged by the bidirectional converter, the bidirectional converter is operated in a variable-frequency mode and the low-voltage converter is also operated in the variable-frequency mode. The on/off states of different switches are controlled according to the output gain of the bidirectional converter, and thus the on-board charging/discharging system has optimized volume and reduced cost. Moreover, the soft switching is achieved when the output gain is lower than 1, greater than 1 or equal to 1. Consequently, the efficiency of the on-board charging/discharging system is enhanced. Moreover, while the low-voltage converter is operated in a fixed-frequency mode, the first bridge of the bidirectional converter is correspondingly controlled. Consequently, the voltage of the bus capacitor is within a reasonable range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.