公开(公告)号：US20240145760A1

公开(公告)日：2024-05-02

申请号：US18398471

申请日：2023-12-28

Applicant: BYD COMPANY LIMITED

Inventor： Yi PAN ,  Yongjun MA ,  Zizhu GUO ,  Liangjun WANG ,  Huajun SUN

IPC: H01M10/052 ,  H01M4/02 ,  H01M4/04 ,  H01M4/38 ,  H01M10/0569 ,  H01M10/058 ,  H01M10/44 ,  H01M50/249

CPC classification number: H01M10/052 ,  H01M4/0416 ,  H01M4/0435 ,  H01M4/382 ,  H01M4/386 ,  H01M10/0569 ,  H01M10/058 ,  H01M10/44 ,  H01M50/249 ,  H01M2004/027 ,  H01M2220/20

Abstract: A lithium battery includes a positive electrode plate, a negative electrode plate, a separator located between the positive electrode plate and the negative electrode plate, and an electrolyte solution. The negative electrode material layer of the negative electrode plate includes a lithium-silicon composite negative electrode active material. The negative electrode material layer has a protective layer on the surface or the lithium-silicon composite negative electrode active material has a protective layer on the surface. The protective layer includes a polymer matrix and a lithium salt. When the lithium battery is fully charged, the lithium-silicon composite negative electrode active material includes elemental lithium and a lithium-silicon alloy Li4.4Si, and the elemental lithium accounts for 15%-95% by mole of the lithium-silicon composite negative electrode active material.

公开(公告)号：US20230238513A1

公开(公告)日：2023-07-27

申请号：US18121909

申请日：2023-03-15

Applicant: BYD COMPANY LIMITED

Inventor： Na CHEN ,  Minghao ZHUANG ,  Rong HAO ,  Yi PAN

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  C01B25/45

CPC classification number: H01M4/364 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  C01B25/45 ,  H01M2004/021

Abstract: A positive electrode material includes a first lithium manganese iron phosphate material in an aggregate form, a second and third lithium manganese iron phosphate materials in an aggregate and/or single-crystal-like form, and a fourth and fifth lithium manganese iron phosphate materials in a single-crystal-like form. D505

公开(公告)号：US20230223547A1

公开(公告)日：2023-07-13

申请号：US18174795

申请日：2023-02-27

Applicant: BYD COMPANY LIMITED

Inventor： Riguo MEI ,  Xiaoya CHANG ,  Zhengjiao LIU ,  Ziwen WU ,  Yi PAN

IPC: H01M4/62 ,  H01M4/134 ,  H01M10/0525

CPC classification number: H01M4/628 ,  H01M4/134 ,  H01M10/0525

Abstract: Provided are an electrode plate and a lithium-ion battery, the electrode plate includes a current collector layer, a semiconductor layer and an alkali metal replenishing layer. The semiconductor layer is disposed on at least one surface of the current collector layer. The alkali metal replenishing layer is a lithium-replenishing agent layer or a sodium-replenishing agent layer. The alkali metal replenishing layer is arranged on a side of the semiconductor layer far away from the current collector layer.

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.

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.

公开(公告)号：US20220255066A1

公开(公告)日：2022-08-11

申请号：US17614285

申请日：2020-05-27

Applicant: BYD COMPANY LIMITED

Inventor： Yi PAN ,  Rong HAO ,  Na CHEN ,  Xiaotao YUAN

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/505

Abstract: Disclosed herein are a composite cathode material for a lithium-ion battery, a lithium-ion battery, and a vehicle. A core of the cathode material is a lithium-nickel-cobalt-manganese oxide material. A surface layer of the cathode material is a lithium-nickel-cobalt oxide material doped with an element E. There is a transition layer between the core and the surface layer. The transition layer is a lithium-nickel-cobalt-manganese oxide material doped with the element E. A content of the element E in the transition layer shows a decreasing trend in a direction from the surface layer of the cathode material to the core. A general formula for the composition of the transition layer is Li1+mNi1-x-y-zCoxMnyEzO2. 0≤m≤0.1, 0.01≤x≤0.1, 0.01≤y≤0.1, and 0.01≤z≤0.1. E is at least one of Al, Zr, Ti, Y, Ba or Sr.

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

IPC: B60L58/27 ,  B60L15/02 ,  B60L58/18 ,  H02J7/00

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.

公开(公告)号：US20240186490A1

公开(公告)日：2024-06-06

申请号：US18394462

申请日：2023-12-22

Applicant: BYD COMPANY LIMITED

Inventor： Bin CHENG ,  Yi PAN ,  Minghao ZHUANG ,  Yuzhen YE ,  Ruoyi DENG

IPC: H01M4/36 ,  C01B25/45 ,  H01M4/58 ,  H01M4/587

CPC classification number: H01M4/366 ,  C01B25/45 ,  H01M4/5825 ,  H01M4/587 ,  C01P2004/86 ,  C01P2006/40

Abstract: A battery positive electrode material includes a core and a first shell layer arranged on a surface of the core. The core includes LiMnxFe1-xPO4. The first shell layer includes LiMnyFe1-yPO4, where 0

公开(公告)号：US20240097142A1

公开(公告)日：2024-03-21

申请号：US18523574

申请日：2023-11-29

Applicant: BYD COMPANY LIMITED

Inventor： Yiwei HU ,  Zizhu GUO ,  Yi PAN ,  Jianchang ZHANG ,  Huajun SUN

IPC: H01M4/75 ,  H01M4/66 ,  H01M4/74

CPC classification number: H01M4/75 ,  H01M4/661 ,  H01M4/74

Abstract: A dry battery electrode plate includes: a metal current collector and a self-supporting electrode film. The metal current collector is provided with pores. The self-supporting electrode film includes a first electrode film and a second electrode film. The first electrode film is arranged on one side of the metal current collector. The second electrode film is arranged on the other side of the metal current collector facing away from the first electrode film. The first electrode film and the second electrode film are configured to be press-fit connected by an external force. The first electrode film and the second electrode film are attached to the metal current collector. The first electrode film and the second electrode film are connected to each other at positions corresponding to the pores.

公开(公告)号：US20230122863A1

公开(公告)日：2023-04-20

申请号：US18069640

申请日：2022-12-21

Applicant: BYD COMPANY LIMITED

Inventor： Feiyan QIAO ,  Ping LU ,  Haijun WANG ,  Rong HAO ,  Yi PAN

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M10/0568 ,  H01M10/0525

Abstract: The present disclosure relates to an electrolyte solution for a lithium-ion battery. The electrolyte solution includes an organic solvent, a lithium salt, and an additive. The electrolyte solution provided in the present disclosure includes a 6-membered heterocyclyl carboxylic anhydride additive, and can effectively inhibit gas production and the increase of interface impedance in the battery, improve the high-temperature stability of the battery, and prolong the service life of the battery.