公开(公告)号：EP4345932A1

公开(公告)日：2024-04-03

申请号：EP22852334.6

申请日：2022-08-05

Applicant: BYD Company Limited

Inventor： YUAN, Xiaotao ,  XU, Zhan ,  CHEN, Peixing ,  WU, Xuanwei ,  HE, Kefeng

IPC: H01M4/13 ,  H01M4/139 ,  H01M10/0525

Abstract: An electrode, a preparation method for an electrode, and a battery are provided. The electrode includes n electrode plate layers sequentially stacked. The electrode plate layer close to a membrane side of the battery is the 1 st layer, and the electrode plate layer close to a current collector side is the n th layer. N is a natural number greater than or equal to 2. An electrode material of the electrode plate layer at the 1 st layer includes first particles, and an electrode material of the electrode plate layer at each layer from the 2 nd layer to the n th layer includes at least the first particles and second particles. An average particle size of the first particles is greater than an average particle size of the second particles. Porosity of the electrode plate layers gradually increases layer by layer in a direction from the n th layer to the 1 st layer.