公开(公告)号：US20200303926A1

公开(公告)日：2020-09-24

申请号：US16089471

申请日：2017-02-04

Applicant: BYD COMPANY LIMITED

Inventor： Shiqing YANG

IPC: H02J7/00 ,  H02M3/335

Abstract: The present invention discloses a car charger. The car charger includes a bidirectional converter module, a bidirectional direct current (DC)/DC conversion module, a collection module, and a control module. The bidirectional converter module is connected to an alternating current (AC) terminal. The bidirectional DC/DC conversion module includes a first DC conversion unit, a transformer unit, and a second DC conversion unit. The first DC conversion unit is connected to the bidirectional converter module and the transformer unit. The second DC conversion unit is connected to a transformer module and an energy storage device. The collection module collects an output of the AC terminal, a rectified output of the bidirectional converter module, and an output of the second DC conversion unit, and collects an output of the energy storage device, an output of the first DC conversion unit, and an inverter output of the bidirectional converter module. The control module performs controlling according to the data collected by the collection module. The car charger can implement bidirectional energy transmission and isolate an AC side and a DC side. The present invention further discloses a vehicle.

公开(公告)号：US20190176652A1

公开(公告)日：2019-06-13

申请号：US16321176

申请日：2017-07-17

Applicant: BYD COMPANY LIMITED

Inventor： Jingcui TENG ,  Shiqing YANG

IPC: B60L53/24 ,  B60L58/12 ,  H02M7/797 ,  H02M3/335 ,  H02J7/00 ,  H02J7/02

Abstract: An electric vehicle, a multifunctional car charger therefor and a control method thereof. The charger includes: a bidirectional AC/DC conversion circuit, a first and a second DC/DC conversion circuit, a sampling circuit and a control module. The sampling circuit samples a voltage and a current of a power grid, a voltage of the direct-current end of the bidirectional AC/DC conversion circuit, a voltage and a current of the power battery and a voltage and a current of the low-voltage battery respectively; and the control module is configured to control the bidirectional AC/DC conversion circuit, the first DC/DC conversion circuit and the second DC/DC conversion circuit according to the sampling result of the sampling circuit, to realize any one of a power battery charging function, a low-voltage battery charging function, a power battery alternating-current inversion function, a low-voltage battery alternating-current inversion function and a power battery low-voltage loaded output function.

公开(公告)号：US20190168632A1

公开(公告)日：2019-06-06

申请号：US16323055

申请日：2017-08-04

Applicant: BYD COMPANY LIMITED

Inventor： Linwang DENG ,  Jingcui TENG ,  Chao WANG ,  Yu ZENG ,  Shiqing YANG

IPC: B60L53/62 ,  B60L58/13

Abstract: 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.