公开(公告)号：EP4451405A1

公开(公告)日：2024-10-23

申请号：EP22942128.4

申请日：2022-05-20

申请人： Contemporary Amperex Technology (Hong Kong) Limited

发明人： LI, Quanguo ,  LIU, Qian ,  YE, Yonghuang ,  YU, Chunpeng ,  SUN, Jingxuan ,  CHEN, Jiahua ,  XIAO, Dejun

IPC分类号： H01M10/054

摘要： The present application provides a sodium-ion battery, a battery module, a battery pack, and an electrical device. The sodium-ion battery includes a positive electrode plate, a negative electrode plate, and a separator; the positive electrode plate includes a positive electrode current collector and a positive electrode active material layer arranged on at least one surface of the positive electrode current collector, the negative electrode plate includes a negative electrode current collector and a negative electrode active material layer arranged on at least one surface of the negative electrode current collector, and the separator is arranged between the positive electrode plate and the negative electrode plate; the positive electrode active material layer has a porosity denoted as α, the negative electrode active material layer has a porosity denoted as β, and the separator has a porosity denoted as γ, which satisfy 0 ≤ (β-α)/γ

公开(公告)号：EP4407714A3

公开(公告)日：2024-10-23

申请号：EP24182464.8

申请日：2020-08-31

申请人： Contemporary Amperex Technology (Hong Kong) Limited

发明人： LIU, Qian ,  HU, Xia ,  LI, Quanguo ,  YE, Yonghuang ,  LI, Wei

IPC分类号： H01M4/13 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/48 ,  H01M4/505 ,  H01M4/525

摘要： This application provides a secondary battery (5) and a preparation method thereof, and a battery module (4), battery pack (1), and apparatus containing a secondary battery (5). The secondary battery (5) includes a positive electrode plate, the positive electrode plate includes a positive electrode current collector and a positive electrode film layer that is disposed on the positive electrode current collector and that includes a positive electrode active material, where the positive electrode active material includes a first material and a second material, the first material contains lithium transition metal oxide, the second material contains lithium transition metal phosphate, the lithium transition metal phosphate includes secondary particles formed by agglomeration of primary particles, and the second material has a lower discharge platform voltage than the first material with respect to a same type of counter electrode.