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公开(公告)号：US20230249564A1
公开(公告)日：2023-08-10
申请号：US18299021
申请日：2023-04-11
申请人： BYD COMPANY LIMITED
发明人： Weidong LIU , Chao WANG , Xinghui WANG
CPC分类号： B60L53/20 , H02M3/33569 , H02M1/4208 , B60L2210/10 , B60L2210/30
摘要： A charging device includes a PFC circuit, a first DC conversion module, a second DC conversion module, a switch module, and a control module. The PFC circuit includes at least three-phase bridge arm and is configured to perform PFC on an input AC and output a DC signal after the PFC. The first DC conversion module and the second DC conversion module are coupled to the PFC circuit to convert the AC signal. The switch module configured to turn on the three-phase bridge arm of the PFC circuit during three-phase charging or turn on one of the three-phase bridge arm of the PFC circuit during one-way charging. The control module is connected to the PFC circuit, the first and second DC conversion modules, and the switch module to control the charging device to perform single-phase charging or three-phase charging.
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2.发明申请公开(公告)号：US20200254902A1
公开(公告)日：2020-08-13
申请号：US16642718
申请日：2018-08-31
申请人： BYD COMPANY LIMITED
发明人： Hongbin LUO , Chao WANG , Xiaofeng SHEN , Qiuyong ZENG
摘要： 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, connected to the collection circuit and the equalization circuit; and a power supply branch circuit, controlled by the controller to get connected to a power supply unit and the battery equalization system when a vehicle is in an OFF gear and a cell needs enabling of equalization, so that the power supply unit supplies power to the battery equalization system.
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公开(公告)号：US20200083815A1
公开(公告)日：2020-03-12
申请号：US16465944
申请日：2017-12-01
申请人： BYD COMPANY LIMITED
发明人： Ni ZHANG , Xinghui WANG , Chao WANG , Xiaofeng SHEN , Baihe WU
摘要： A control method includes the following steps: when the DC-DC converter works every time, acquiring total time TC for controlling an H-bridge in a third mode and total time TD for controlling the H-bridge in a fourth mode, and acquiring set time Ti for controlling the H-bridge in the third mode and set time Tm for controlling the H-bridge in the fourth mode in each working cycle during a working process of the DC-DC converter; judging a relation between the TC and the TD; and selecting the mode for controlling the H-bridge when the DC-DC converter is started according to the relation between the total time TC and the total time TD, and alternately controlling the H-bridge according to the Ti and the Tm, the second switch tube, the third switch tube and the fourth switch tube in the H-bridge to be relatively balanced.
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公开(公告)号：US20230356626A1
公开(公告)日：2023-11-09
申请号：US18338936
申请日：2023-06-21
申请人： BYD COMPANY LIMITED
发明人： Hongbin LUO , Chao WANG , Xiaofeng SHEN , Qiuyong ZENG
CPC分类号： B60L58/22 , H02J7/0019 , H02J7/0047 , H02J7/0014
摘要： 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, connected to the collection circuit and the equalization circuit; and a power supply branch circuit, controlled by the controller to get connected to a power supply unit and the battery equalization system when a vehicle is in an OFF gear and a cell needs enabling of equalization, so that the power supply unit supplies power to the battery equalization system.
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公开(公告)号：US20230261492A1
公开(公告)日：2023-08-17
申请号：US18295610
申请日：2023-04-04
申请人： BYD COMPANY LIMITED
发明人： Weidong LIU , Chao WANG , Xinghui WANG
CPC分类号： H02J7/007 , B60L53/22 , H02M1/42 , H02M1/126 , H02M3/33584 , B60L2210/10 , H02J2207/20
摘要： A charging device includes a first DC convertor and controller. The first DC convertor is configured to convert a DC signal outputted by a power battery to a DC signal required for a storage battery. The first DC convertor includes a first half-bridge logical link control (LLC) circuit and a second half-bridge LLC circuit arranged in parallel. The controller is connected with the first half-bridge LLC circuit and the second half-bridge LLC circuit and configured to acquire a total output current of the first DC convertor, and control the first half-bridge LLC circuit and the second half-bridge LLC circuit to operate alternately when the total output current is less than a current threshold.
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公开(公告)号：US20230200029A1
公开(公告)日：2023-06-22
申请号：US18015178
申请日：2021-07-01
申请人： BYD COMPANY LIMITED
发明人： Bin WU , Baochuan LONG , Lianjun DU , Shulin LIANG , Chao WANG
CPC分类号： H05K7/20872 , H05K9/0037 , H05K7/20272 , H01F27/24 , H01F27/306 , B60R16/02
摘要： A vehicle-mounted power supply apparatus and a vehicle having same. The vehicle-mounted power supply apparatus (100) includes: a housing (110), a magnetic device (120), and a shielding component (130). A mounting position (111) is arranged in the housing (110). The magnetic device (120) is an integrated part and is arranged at the mounting position (111), The shielding component (130) is arranged in the housing 110), and the shielding component (130) surrounds a periphery of the mounting position (111).
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7.发明申请公开(公告)号：US20200346558A1
公开(公告)日：2020-11-05
申请号：US16642811
申请日：2018-08-31
申请人： BYD COMPANY LIMITED
发明人： Hongbin LUO , Chao WANG , Xiaofeng SHEN , Qiuyong ZENG , Yuanhong LIU , Xiang ZHANG
摘要： A battery equalization method includes: obtaining a voltage value of a to-be-equalized cell in a battery pack; obtaining a reference voltage value required for equalization; determining a target equalization duration of the to-be-equalized cell according to a voltage value of the to-be-equalized cell, the reference voltage value, and a preset equalization duty cycle, where the equalization duty cycle is a ratio of an equalization period in a unit cycle to the unit cycle, and the unit cycle includes the equalization period and a sampling period; and controlling equalization of the to-be-equalized cell in the equalization period in the unit cycle according to the target equalization duration. According to this method, sampling is separated from equalization in a unit cycle, thereby ensuring accuracy of collected battery information, making the calculated equalization duration relatively accurate, and improving equalization effects of the battery pack.
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公开(公告)号：US20200346552A1
公开(公告)日：2020-11-05
申请号：US16642816
申请日：2018-08-31
申请人： BYD COMPANY LIMITED
发明人： Hongbin LUO , Chao WANG , Xiaofeng SHEN , Chengzhi WANG , Qiuyong ZENG
摘要： 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.
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9.发明申请公开(公告)号：US20190168632A1
公开(公告)日：2019-06-06
申请号：US16323055
申请日：2017-08-04
申请人： BYD COMPANY LIMITED
发明人： Linwang DENG , Jingcui TENG , Chao WANG , Yu ZENG , Shiqing YANG
摘要： 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.
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公开(公告)号：US20230226933A1
公开(公告)日：2023-07-20
申请号：US18121943
申请日：2023-03-15
申请人： BYD COMPANY LIMITED
发明人： Weidong LIU , Chao WANG , Xinghui WANG
CPC分类号： B60L53/18 , B60L58/18 , B60L2240/547 , B60L2240/549 , B60L2210/10
摘要： A method for charging control of a hybrid electric vehicle, includes: receiving a charging instruction; acquiring a first voltage of a power battery and a second voltage of a storage battery in response to receiving the charging instruction; in response to determining that the first voltage is less than the first voltage threshold and the second voltage is less than the second voltage threshold, disconnecting the OBC from the power battery and charging the storage battery through the OBC and the DC for a charging duration; and in response to that the charging duration of the storage battery reaches a duration threshold, connecting the OBC to the power battery and charging the power battery through the OBC.
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