公开(公告)号：US20230307643A1

公开(公告)日：2023-09-28

申请号：US18041522

申请日：2021-04-15

Applicant: BYD COMPANY LIMITED

Inventor： Kaixiang CHEN ,  Xiaodi XIE ,  Biao ZENG ,  Haipeng YAN

IPC: H01M4/587 ,  H01M4/66 ,  H01M4/133

CPC classification number: H01M4/587 ,  H01M4/661 ,  H01M4/133 ,  H01M2004/027

Abstract: A negative electrode plate is provided, which includes a current collector, and a first negative electrode active material layer and a second negative electrode active material layer sequentially arranged on the current collector. A tortuosity of the first negative electrode active material layer and a tortuosity of the second negative electrode active material layer satisfy: 1

公开(公告)号：US20230070599A1

公开(公告)日：2023-03-09

申请号：US17800664

申请日：2021-02-07

Applicant: BYD COMPANY LIMITED

Inventor： Wansong YUAN ,  Haipeng YAN ,  Xi JIANG ,  Xiangda ZOU ,  Yan ZHU

IPC: H01M10/04 ,  H01M10/658 ,  H01M10/44

Abstract: A cell array, including a plurality of cells arranged in sequence is provided. Each of the plurality of cells includes a housing and an electrode core. The electrode core includes an electrode plate. The electrode plate includes a current collector and a coating layer arranged on the current collector. The cell array satisfies the following formula 1: (1−JRw)+(SRw−1)=10%−15%. JRw is an expansion space for the electrode core inside each of the plurality of cells in a first direction, SRw is an expansion space outside the plurality of cells in the first direction, and a thickness direction of each of the plurality of cells is defined as the first direction. JRw=Pw/(Cellw−Kw−Cw). SRw=(Mw−MNw)/(Celln×Cellw).