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公开(公告)号：US20250074253A1
公开(公告)日：2025-03-06
申请号：US18951271
申请日：2024-11-18
Applicant: BYD COMPANY LIMITED
Inventor： Ke ZHANG , Rongfang WU , Xi WANG , Zizhu GUO , Yi PAN
Abstract: A power supply device includes a first and a second battery cell. A ratio of first parameters of the first battery cell to the second battery cell is greater than a first threshold. A ratio of second parameters of the second battery cell to the first battery cell is greater than a second threshold. When a capacity of the first battery cell is greater than that of the second battery cell, the first battery cell and/or the second battery cell are/is discharged according to a rule including a first, a second, and a third condition. When the first condition is satisfied, the first battery cell is discharged to a load. When the second condition is satisfied, the first battery cell and the second battery cell are discharged to the load. When the third condition is satisfied, the first battery cell is discharged to the second battery cell and the load.
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公开(公告)号：US20240109436A1
公开(公告)日：2024-04-04
申请号：US18535746
申请日：2023-12-11
Applicant: BYD COMPANY LIMITED
CPC classification number: B60L50/64 , B60L58/18 , H01M2010/4271
Abstract: A battery pack and a vehicle are provided. The battery pack is configured to provide electric energy required by the vehicle under different operating conditions. The battery pack includes a task manager, a first battery unit and a second battery unit. The first battery unit and the second battery unit respectively respond to a different operating state of a load and provide the electric energy required under the control of the task manager.
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公开(公告)号：US20240014480A1
公开(公告)日：2024-01-11
申请号：US18373251
申请日：2023-09-26
Applicant: BYD COMPANY LIMITED
IPC: H01M50/169 , H01M50/103 , H01M50/119 , H01M50/159 , H01M50/15
CPC classification number: H01M50/169 , H01M50/103 , H01M50/119 , H01M50/159 , H01M50/15
Abstract: A housing is configured to accommodate an electrode core. The housing includes a peripheral wall and a first cover plate. The peripheral wall includes a first opening. An edge portion is disposed on a periphery of the first cover plate, and the edge portion is configured to melt to form a melted edge around the periphery of the first cover plate. The first cover plate is configured to be bonded with the peripheral wall through the melted edge to close the first opening.
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Patent Agency Ranking
公开(公告)号：US20240351477A1
公开(公告)日：2024-10-24
申请号：US18759652
申请日：2024-06-28
Applicant: BYD COMPANY LIMITED
Inventor： Ke ZHANG , Jiannian LI , Rongfang WU , Zizhu GUO , Yi PAN
CPC classification number: B60L58/27 , B60L15/02 , B60L58/18 , H02J7/0013
Abstract: A heating circuit of a power battery is provided. The power battery includes a first battery core group and a second battery core group connected in series. The heating circuit includes an inverter, an alternating current motor, and a first controller. A neutral point of the alternating current motor is connected to a first connection point between the first battery core group and the second battery core group. The first controller is configured to input a driving signal to control the inverter to alternately connect the first battery core group to the alternating current motor and the second battery core group to the alternating current motor, to cause the first battery core group and the second battery core group to charge each other.
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公开(公告)号：US20250033530A1
公开(公告)日：2025-01-30
申请号：US18917096
申请日：2024-10-16
Applicant: BYD COMPANY LIMITED
Inventor： Ke ZHANG , Zizhu GUO , Yi PAN , Yan ZHU , Huajun SUN
IPC: B60L58/24 , B60L15/00 , B60L58/27 , H01M10/615 , H01M10/625 , H01M10/63 , H01M10/6571 , H01M50/51 , H05B6/10
Abstract: A power battery comprises a first battery cell group and a second battery cell group that are not equal in electromotive force and connected in series. The heating system comprises an inverter, an alternating-current motor, and a first controller. Midpoints of three bridge arms of the inverter are connected to head ends of three-phase coils of the motor in a one-to-one correspondence manner, and tail ends of the motor are connected together to form a neutral point. The neutral point is connected to a first connection point by means of a connection line, and the first connection point is a connection point between the first and second battery cell groups. The first controller is used for inputting a driving signal to the inverter. The first battery cell group, the second battery cell group, the inverter, the motor, and the connection line form an alternating-current self-heating loop.
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6.发明公开公开(公告)号：US20240128537A1
公开(公告)日：2024-04-18
申请号：US18532313
申请日：2023-12-07
Applicant: BYD COMPANY LIMITED
Inventor： Ke ZHANG , Na CHEN , Jiannian LI , Yi PAN , Zizhu GUO
IPC: H01M10/63 , H01M10/615 , H01M10/625 , H01M10/659 , H02J7/00
CPC classification number: H01M10/63 , H01M10/615 , H01M10/625 , H01M10/659 , H02J7/0047 , H01M2220/20
Abstract: A self-heating control method and a self-heating control system for a rechargeable battery are disclosed. The rechargeable battery includes a battery core. A separator is provided between a positive electrode and a negative electrode of the battery core. A reference electrode is correspondingly provided at the separator. A surface electrode is correspondingly provided on the negative electrode surface of the battery core. The method includes: detecting the potential difference between the reference electrode and the surface electrode, generating a charging current adjustment instruction according to the potential difference between the reference electrode and the surface electrode, and adjusting the charging current of the rechargeable battery according to the charging current adjustment instruction during the self-heating process of the rechargeable battery.
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公开(公告)号：US20250038306A1
公开(公告)日：2025-01-30
申请号：US18917868
申请日：2024-10-16
Applicant: BYD COMPANY LIMITED
Inventor： Ke ZHANG , Zizhu GUO , Yi PAN , Yan ZHU , Huajun SUN
IPC: H01M10/6572 , H01M10/615 , H01M10/617 , H01M10/625 , H01M10/63
Abstract: A heating system for heating a battery, includes an inverter including three bridge arms, an alternating current motor, a first controller, and a connection line. A positive electrode of the battery connects to upper bridge arms of the inverter. A negative electrode of the battery connects to lower bridge arms of the inverter. Midpoints of the three bridge arms connects to head ends of three coils of the alternating current motor respectively. Tail ends of the three coils connects together as a neutral point. A first end of the connection line connects to the neutral point, and a second end of the connection line connects to the battery. The first controller inputs a drive signal to the inverter. The battery, the inverter, the alternating current motor, and the connection line form an alternating current self-heating loop. A heating device connects to the connection line, and heats the battery.
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公开(公告)号：US20250038305A1
公开(公告)日：2025-01-30
申请号：US18916997
申请日：2024-10-16
Applicant: BYD COMPANY LIMITED
Inventor： Ke ZHANG , Zizhu GUO , Yi PAN , Yan ZHU , Huajun SUN
IPC: H01M10/6572 , H01M10/615 , H01M10/625
Abstract: A power battery comprises a first cell group and a second cell group connected in series. The heating system comprises an inverter, an AC motor, a first controller, and a plurality of connection lines. The midpoints of three bridge arms of the inverter are connected to the head ends of three-phase coils of the AC motor in a one-to-one correspondence. The tail ends of the AC motor are connected together to form a neutral point. First ends of the connection lines are connected to the neutral point of the AC motor. Second ends of the connection lines are connected to a connection point between the first cell group and the second cell group. The first controller is configured to input a drive signal to the inverter. The first cell group, the second cell group, the inverter, the AC motor, and the connection lines form an AC self-heating loop.
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