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：US20230023215A1

公开(公告)日：2023-01-26

申请号：US17785871

申请日：2020-11-11

Applicant: BYD COMPANY LIMITED

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

IPC: H01M4/38 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/62

Abstract: The present disclosure relates to a lithium-replenishing material, a preparation method thereof, and a lithium-ion battery. The lithium-replenishing material comprises metal lithium particles and conductive material, and the conductive material includes a built-in segment embedded in metal lithium particles and an exposed segment external to metal lithium particles; the electrical conductivity of the conductive material is greater than 100 s/cm. The lithium-replenishing material of the present disclosure can accomplish the electron conduction between the metal lithium particles and the anode active material through the conductive material, which increases the channel of electron conduction, and at the same time facilitates the transport of lithium ions, and improves the efficiency of lithium-replenishing significantly by rapid intercalation process of lithium ions, thereby resulting in inhibiting the formation of isolated lithium effectively and avoiding the formation of dendrites piercing the battery separator and causing potential safety hazards.

公开(公告)号：US20240097140A1

公开(公告)日：2024-03-21

申请号：US18524583

申请日：2023-11-30

Applicant: BYD COMPANY LIMITED

Inventor： Yanhui CUI ,  Yi PAN ,  Riguo MEI

IPC: H01M4/74 ,  H01M4/04 ,  H01M4/66

CPC classification number: H01M4/742 ,  H01M4/0402 ,  H01M4/661 ,  H01M2004/021

Abstract: A current collector, an electrode sheet, and a fabrication method for a current collector are disclosed. The current collector includes a support layer, a first electrically conductive layer and a second electrically conductive layer. The support layer has a first surface and a second surface arranged opposite to each other. The first electrically conductive layer has a grid structure distributed on the first surface and/or the second surface of the support layer. The second electrically conductive layer is provided on a surface of the first electrically conductive layer away from the support layer.

公开(公告)号：US20230307614A1

公开(公告)日：2023-09-28

申请号：US18205175

申请日：2023-06-02

Applicant: BYD COMPANY LIMITED

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

IPC: H01M4/36 ,  H01M10/0525 ,  H01M10/42 ,  H01M4/40 ,  H01M10/0585

CPC classification number: H01M4/366 ,  H01M10/0525 ,  H01M10/4235 ,  H01M4/405 ,  H01M10/0585 ,  H01M2220/20 ,  H01M2004/021

Abstract: A lithium-ion battery includes a cell including N battery unit, and at least one negative electrode lithium replenishing agent film that includes an independent lithium replenishing electrode including a current collector and a first metal lithium layer disposed on the current collector, or includes a second metal lithium layer laminated on a surface of a negative electrode material layer. An areal density σ of the metal lithium layer and a parameter θ satisfy certain relationships. Each of the N battery units includes a positive electrode plate, a negative electrode plate, and a separator sandwiched between the positive electrode plate and the negative electrode plate. The positive electrode plate comprises a positive electrode current collector and a positive electrode material layer disposed on the positive electrode current collector. The negative electrode plate includes a negative electrode current collector and a negative electrode material layer disposed on the negative electrode current collector.