Loading patent…
AssigneeBYD Company Limited
InventorsLinwang DENG, Jingcui TENG, Chao WANG, Yu ZENG, Shiqing YANG
Estimating the term…
The present disclosure discloses an energy management system of an electric vehicle, a control method therefor, and an electric vehicle. The system includes: a power battery including a plurality of battery modules; a plurality of balanced DC-DC converter modules, first ends of the balanced DC-DC converter modules being correspondingly connected to the battery modules and second ends of the balanced DC-DC converter modules being connected in parallel to a low-voltage direct-current bus; a bidirectional car charger having an alternating-current end configured to connect to a power grid/charging box, a first direct-current end connected to the low-voltage direct-current bus, and a second direct-current end connected to a high-voltage direct-current bus; a sampling module; and a control module configured to separately control each balanced DC-DC converter module according to the state information of each battery module, the state information of the low-voltage battery, the state information of the power battery and the load information of the low-voltage electric apparatuses to perform balancing management on the plurality of battery modules, supply power to the low-voltage electric apparatuses, and charge the low-voltage battery, and controlling the bidirectional car charger to supply power to the low-voltage electric apparatuses and charge the low-voltage battery. The system realizes the power supply to the low-voltage components of the entire vehicle, the balancing of the power battery and the redundancy design of key functions, and improves the safety and reliability of the system.
An energy management system of an electric vehicle, comprising:
A control method for an energy management system of an electric vehicle, wherein the energy management system of the electric vehicle comprises a power battery, a plurality of balanced DC-DC converter modules and a bidirectional car charger, the power battery comprises a plurality of battery modules, first ends of the balanced DC-DC converter modules are correspondingly connected to the battery modules, second ends of the balanced DC-DC converter modules are connected in parallel to a low-voltage direct-current bus to respectively supply power to low-voltage electric apparatuses of the electric vehicle and charge a low-voltage battery through the low-voltage direct-current bus, an alternating-current end of the bidirectional car charger is configured to connect to a power grid/charging box, a first direct-current end of the bidirectional car charger is connected to the low-voltage direct-current bus, a second direct-current end of the bidirectional car charger is connected to a high-voltage direct-current bus, the high-voltage direct-current bus is connected to the power battery, and the method comprises the following steps:
21-28. (canceled)
Dependencies are inferred from the claim text.