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：US20220355686A1

公开(公告)日：2022-11-10

申请号：US17624076

申请日：2020-06-18

Applicant: BYD COMPANY LIMITED

Inventor： Jingcui TENG ,  Yu LIU ,  Shulin LIANG ,  Chao WANG ,  Hongbin LUO

IPC: B60L53/22 ,  H02J7/02 ,  H02P27/06

Abstract: An energy conversion device is provided, including a motor coil (11), a bridge arm converter (12), and a bidirectional bridge arm (13). The bridge arm converter (12) is connected to the motor coil (11) and the bidirectional bridge arm (13). The motor coil (11), the bridge arm converter (12), and the bidirectional bridge arm (13) are all connected to an external charging port (10). Both the bridge arm converter (12) and the bidirectional bridge arm (13) are connected to an external battery 200. The motor coil (11), the bridge arm converter (12), and the external charging port (10) form a DC charging circuit for charging the external battery 200. The motor coil (11), the bridge arm converter (12), the bidirectional bridge arm (13), and the external charging port (10) form an AC charging circuit for charging the external battery (200). The motor coil (11), the bridge arm converter (12), and the external battery (200) form a motor drive circuit.

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.

公开(公告)号：US20220360184A1

公开(公告)日：2022-11-10

申请号：US17624055

申请日：2020-06-18

Applicant: BYD COMPANY LIMITED

Inventor： Jingcui TENG ,  Shulin LIANG ,  Yu LIU ,  Chao WANG

IPC: H02M3/335

Abstract: This application discloses an energy conversion apparatus, a power system, and a vehicle. The energy conversion apparatus includes: an inductor (12), where an end of the inductor is connected to an external charging port (2); a bridge arm converter (13), connected between an external battery (3) and the external charging port (2), where the bridge arm converter (13) includes a first phase bridge arm (131), a second phase bridge arm (132), and a third phase bridge arm (133) connected in parallel, and the other end of the inductor (12) is connected to the first phase bridge arm (131); a voltage transformation unit (14), where an input end of the voltage transformation unit is respectively connected to the second phase bridge arm (132) and the third phase bridge arm (133); and a first bidirectional H-bridge (15), connected between an output end of the voltage transformation unit (14) and the external battery (3).