公开(公告)号：US20230099141A1

公开(公告)日：2023-03-30

申请号：US17801024

申请日：2021-02-07

Applicant: BYD COMPANY LIMITED

Inventor： Wansong YUAN ,  Xiangda ZOU ,  Dongjun DENG ,  Wenhui CHEN ,  Yan ZHU

IPC: H01M50/618 ,  H01M50/103 ,  H01M50/133 ,  H01M10/658

Abstract: A battery case is provided, including a plurality of side plates. A first side plate has the largest area among the plurality of side plates, and at least one first side plate includes a first portion and a second portion. The first portion is a curved surface concave toward inside of the battery case. A three-dimensional coordinate system is established in a first direction, a second direction, and a third direction, and the second direction is perpendicular to the first side plate. A curvature of the first portion is less than a curvature of an ellipsoid, the curvature of the ellipsoid is obtained from an ellipsoid function, and the ellipsoid function is: ((x−a)/i)2+((y−b)/j)2+((z−c)/k)2=1, where, a, b, c, i, j, and k are determined according to coordinates of at least four points that are different from each other, and x, y, and z are coordinates of the three directions of the ellipsoid function.

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).