公开(公告)号：EP4456226A1

公开(公告)日：2024-10-30

申请号：EP23787505.9

申请日：2023-03-28

申请人： Contemporary Amperex Technology (Hong Kong) Limited

发明人： HE, Jianfu ,  LIU, Qian ,  YE, Yonghuang ,  ZHANG, Tao ,  JIN, Haizu

IPC分类号： H01M10/04 ,  H01M50/682

摘要： Provided are a battery cell, a battery and an electric device. The battery cell comprises: a housing; an electrode assembly, which is accommodated in the housing; and a buffer piece, which is accommodated in the housing and connected to the electrode assembly, and is used for buffering an expansion of the electrode assembly, wherein the buffer piece comprises a first closed hole, and the volume V1 of the first closed hole and the volume V of the buffer piece satisfy: V1/V > 10%. By means of the technical scheme of the present application, the performance of a battery can be improved.

公开(公告)号：EP4451377A1

公开(公告)日：2024-10-23

申请号：EP22938994.5

申请日：2022-04-27

申请人： Contemporary Amperex Technology (Hong Kong) Limited

发明人： WANG, Yuwen ,  WU, Yiyang ,  YE, Yonghuang ,  WU, Baozhen ,  YOU, Xingyan

IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M4/583 ,  H01M4/133 ,  H01M4/134 ,  H01M10/0525

摘要： A secondary battery (5) is disclosed, including: a positive electrode plate, a negative electrode plate, and a separator. The separator is disposed between the positive electrode plate and the negative electrode plate. The negative electrode plate includes a negative current collector and a negative active material layer disposed on at least one surface of the negative current collector. A negative active material in the negative active material layer includes graphite, amorphous carbon, and a non-carbon negative electrode material. The amorphous carbon includes one or more of hard carbon, soft carbon, or porous carbon. The non-carbon negative electrode material is a silicon-based negative electrode material and/or a tin-based negative electrode material.

公开(公告)号：EP4451363A1

公开(公告)日：2024-10-23

申请号：EP22947406.9

申请日：2022-06-24

申请人： Contemporary Amperex Technology (Hong Kong) Limited

发明人： WU, Yiyang ,  BAI, Wenlong ,  YE, Yonghuang ,  WU, Baozhen ,  WU, Kai

IPC分类号： H01M4/133 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525

摘要： The present application provides a fast-charging negative electrode active material and preparation method thereof, a negative electrode plate, a secondary battery, and an electrical device. The fast-charging negative electrode active material includes carbon-based material particles, a cladding layer disposed on at least a portion of the surface of the carbon-based material particles, and a ferroelectric material dispersed in the cladding layer, wherein the cladding layer includes a conductive carbon material, and at least a portion of the ferroelectric material projects from the surface of the cladding layer. The fast-charging negative electrode active materials provided in the present application have good dynamic performance, can withstand high-rate charging, and enhance the fast-charging capability of the secondary battery without sacrificing the high energy density of the secondary battery.

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.

公开(公告)号：EP4451415A1

公开(公告)日：2024-10-23

申请号：EP22948452.2

申请日：2022-06-30

申请人： Contemporary Amperex Technology (Hong Kong) Limited

发明人： XU, Xiaofu ,  SHANG, Yibo ,  PAN, Jianfu ,  SUN, Jingxuan ,  LIU, Qian ,  YE, Yonghuang

IPC分类号： H01M10/42

摘要： Embodiments of the present application provide a charging control method and a charging control apparatus of a lithium-ion battery. The charging control method includes: performing charging control on the lithium-ion battery for the i th time, so that a battery capacity value of the lithium-ion battery at a target charging cut-off voltage is 0.95C 0 to 1.05C 0 , where C 0 is a nominal capacity of the lithium-ion battery, and the target charging cut-off voltage is less than or equal to the nominal voltage of the lithium-ion battery. The charging control method and the charging control apparatus according to the embodiments of the present application are beneficial to keeping the quantity of active lithium unchanged, thereby achieving the effect of automatically supplementing the battery capacity along with aging.