公开(公告)号：EP4102622A1

公开(公告)日：2022-12-14

申请号：EP21757504.2

申请日：2021-02-07

Applicant: BYD Company Limited

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

IPC: H01M50/107 ,  H01M10/625

Abstract: A battery case (100) is provided, including a plurality of side plates. A first side plate (110) has the largest area among the plurality of side plates, and at least one first side plate (110) includes a first portion (111) and a second portion (112). The first portion (111) is a curved surface concave toward inside of the battery case (100). 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：EP4102630A1

公开(公告)日：2022-12-14

申请号：EP21757581.0

申请日：2021-02-07

Applicant: BYD Company Limited

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

IPC: H01M50/207

Abstract: A cell array (20), including a plurality of cells (10) arranged in sequence is provided. Each of the plurality of cells (10) includes a housing (100) and an electrode core (201). The electrode core (201) includes an electrode plate. The electrode plate includes a current collector and a coating layer arranged on the current collector. The cell array (20) satisfies the following formula 1: (1 - JR w ) + (SR w - 1) = 10%-15%. JR w is an expansion space for the electrode core (201) inside each of the plurality of cells (10) in a first direction, SR w is an expansion space outside the plurality of cells (10) in the first direction, and a thickness direction of each of the plurality of cells (10) is defined as the first direction. JR w = P w /(Cell w - K w - Cw). SR w = (M w -MN w )/(Cell n × Cell w ).