公开(公告)号：US20240347727A1

公开(公告)日：2024-10-17

申请号：US18672400

申请日：2024-05-23

申请人： Dongguan Amperex Technology Limited

发明人： Chenchen LI ,  Ping HE ,  Daolin LIU ,  Jun CHEN

IPC分类号： H01M4/583 ,  H01M4/02 ,  H01M4/04 ,  H01M50/48

CPC分类号： H01M4/583 ,  H01M4/0404 ,  H01M50/48 ,  H01M2004/021 ,  H01M2004/027

摘要： An electrochemical apparatus, including: a first electrode assembly including a first negative electrode plate having a first negative current collector with a first negative active material layer disposed on at least one surface; and a second electrode assembly including a second negative electrode plate having a second negative current collector with a second negative active material layer disposed on at least one surface. A coating weight W1f of the first negative active material layer and a coating weight W2f of the second negative active material layer satisfy: 30 mg/1540.25 mm2≤W2f−W1f≤100 mg/1540.25 mm2. By regulating a value of W2f−W1f to be within the above range, energy density of the electrochemical apparatus and swelling performance of the electrochemical apparatus can be improved while fast charging performance is satisfied.

公开(公告)号：US20240266648A1

公开(公告)日：2024-08-08

申请号：US18619933

申请日：2024-03-28

申请人： Dongguan Amperex Technology Limited

发明人： Daolin LIU

IPC分类号： H01M50/145 ,  H01M50/107 ,  H01M50/213 ,  H01M50/502 ,  H01M50/528 ,  H01M50/533 ,  H01M50/536

CPC分类号： H01M50/145 ,  H01M50/107 ,  H01M50/213 ,  H01M50/502 ,  H01M50/528 ,  H01M50/533 ,  H01M50/536

摘要： A cylindrical battery, including: a housing, an electrode assembly, a first current collecting disc, and a protection piece. The housing contains a first end portion. The electrode assembly is accommodated in the housing. The first current collecting disc is electrically connected to the electrode assembly in the housing. The first end portion contains several welding track configured to be connected to the first current collecting disc. The first end portion further contains a first surface oriented away from the first current collecting disc. On the first surface, the welding track are arranged away from a center of the first surface. The protection piece is sheathed around the housing, extends beyond the first surface, and covers the welding track. No welding track is arranged at the center of the first surface.