公开(公告)号：EP3498521A1

公开(公告)日：2019-06-19

申请号：EP17838648.8

申请日：2017-08-04

Applicant: BYD Company Limited

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

IPC: B60L11/18

Abstract: The present invention 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：EP4395109A1

公开(公告)日：2024-07-03

申请号：EP22886044.1

申请日：2022-10-26

Applicant: BYD Company Limited

Inventor： LIU, Weidong ,  WANG, Chao ,  WANG, Xinghui

IPC: H02J7/00 ,  H02M7/02 ,  H02M7/21

CPC classification number: Y02T10/7072 ,  Y02T10/70 ,  H02J7/02 ,  H02J7/00 ,  B60L53/00 ,  H02M7/02 ,  H02M7/21

Abstract: A method and system for charging control, and a vehicle. The method includes: when a first end of a switching circuit (102) is connected to external power supply (105), acquiring a phase voltage and a line voltage of any two-phase first terminals in M phases of first terminals; determining a power supply mode of the external power supply (105) according to the phase voltage and the line voltage; and controlling the switching circuit (102) and a charging circuit (103) to charge a target battery (106) according to the power supply mode.

公开(公告)号：EP4342721A1

公开(公告)日：2024-03-27

申请号：EP22874296.1

申请日：2022-06-17

Applicant: BYD Company Limited

Inventor： WANG, Xinghui ,  WANG, Chao ,  LIU, Weidong

IPC: B60L53/22 ,  H02J7/02 ,  G01R31/54 ,  G01R31/36

Abstract: The present disclosure discloses an on-board charger and an electric vehicle. The on-board charger includes a microprocessor and a DC module. A first sampling point is arranged between the DC module and a storage battery. A second sampling point is arranged between the storage battery and the microprocessor. The microprocessor is configured to: obtain a first voltage and a current value of the first sampling point, and obtain a second voltage of the second sampling point; and mark the connection between the storage battery and the DC module as cut off and record a first difference between the second voltage and the first voltage when the first voltage is greater than the second voltage and the current value is less than a preset current threshold.

公开(公告)号：EP3992019A1

公开(公告)日：2022-05-04

申请号：EP20834887.0

申请日：2020-06-18

Applicant: BYD Company Limited

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

IPC: B60L53/22 ,  B60L53/24 ,  H02J7/02 ,  H02J7/00

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 separately 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：EP3678276A1

公开(公告)日：2020-07-08

申请号：EP18851100.0

申请日：2018-08-31

Applicant: BYD Company Limited

Inventor： LUO, Hongbin ,  WANG, Chao ,  SHEN, Xiaofeng ,  WANG, Chengzhi ,  ZENG, Qiuyong

IPC: H02J7/00 ,  B60L50/50 ,  H01M10/42

Abstract: The present application discloses a battery equalization system, a vehicle, a battery equalization method, and a storage medium. The battery equalization system includes: a collection circuit; an equalization circuit; a controller; a charging branch circuit, connected to a charging device and a battery pack; and a first power supply branch circuit, connected to the charging device and the battery equalization system, and configured to supply power to the battery equalization system. When a state-of-charge of the battery pack is full and a cell in the battery pack needs enabling of equalization, the controller controls the charging branch circuit to disconnect, and controls the first power supply branch circuit to keep connected, so that an equalization module performs equalization processing on the cell that needs enabling of equalization. By improving the electrical connection structure of the battery equalization system, the present application extends the battery equalization time, improves the battery equalization effect, and resolves the technical problem of low equalization efficiency of the battery equalization system in the related art.

公开(公告)号：EP2865138B1

公开(公告)日：2018-11-28

申请号：EP13806802.8

申请日：2013-06-21

Applicant: BYD Company Limited

Inventor： XIA, Huan ,  GONG, Junlin ,  TANG, Xiaohua ,  SHEN, Xiaofeng ,  WANG, Xinghui ,  WANG, Chao

IPC: H04L12/40 ,  H04L12/24 ,  H04L12/26

CPC classification number: G06F13/28 ,  G06F13/4027 ,  G06F13/4282 ,  H04L12/40169 ,  H04L41/082 ,  H04L43/0817 ,  H04L2012/40215 ,  H04L2012/40273

Abstract: A method, an upper computer and a system for programming nodes in a bus network are provided. The method comprises: analyzing a program file to be programmed to obtain data of the program file and a storage address corresponding to the data; broadcasting a routing request message and receiving responding messages returned from a plurality of lower computers, each lower computer corresponding to one node in the bus network; analyzing the responding messages to obtain an operating state of each node among the plurality of layers of nodes; receiving a selected node to be programmed, activating the selected node and transmitting the data and the storage address to a single chip microcomputer corresponding to the selected node when the operating state of each node is a forwarding state; and storing corresponding to the selected node the data in a memory of the single chip microcomputer according to the storage address.

公开(公告)号：EP2865138A1

公开(公告)日：2015-04-29

申请号：EP13806802.8

申请日：2013-06-21

Applicant: BYD Company Limited

Inventor： XIA, Huan ,  GONG, Junlin ,  TANG, Xiaohua ,  SHEN, Xiaofeng ,  WANG, Xinghui ,  WANG, Chao

IPC: H04L12/40

CPC classification number: G06F13/28 ,  G06F13/4027 ,  G06F13/4282 ,  H04L12/40169 ,  H04L41/082 ,  H04L43/0817 ,  H04L2012/40215 ,  H04L2012/40273

Abstract: A method, an upper computer and a system for programming in a bus network are provided. The method comprises: analyzing a program document to be programmed to obtain data of the program document and a storage address corresponding to the data; broadcasting a routing request message and receiving responding messages returned from a plurality of lower computers, each lower computer corresponding to one node in the bus network; analyzing the responding messages to obtain a working state of each node among the plurality of layers of nodes; receiving a selected node to be programmed, activating the selected node and transmitting the data and the storage address to a single chip machine corresponding to the selected node when the working state of each node is a forwarding state; and storing corresponding to the selected node the data in a memory of the single chip machine according to the storage address.