公开(公告)号：US20230352744A1

公开(公告)日：2023-11-02

申请号：US18331405

申请日：2023-06-08

Applicant: Ningde Amperex Technology Limited

Inventor： Hongmei WEI ,  Yibo ZHANG ,  Qiuyan WENG

IPC: H01M10/0587 ,  H01M50/44 ,  H01M50/446 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M10/0587 ,  H01M4/622 ,  H01M10/0525 ,  H01M50/44 ,  H01M50/446

Abstract: A jelly-roll type electrode assembly includes an electrode plate and a separation layer disposed on at least one surface of the electrode plate. A bonding force of the separation layer to a surface of the electrode plate in a first region of the jelly-roll type electrode assembly is greater than a bonding force of the separation layer to the surface of the electrode plate in a second region of the jelly-roll type electrode assembly. In this way, the bonding force of the separation layer to the surface of the electrode plate in the first region in the jelly-roll type electrode assembly is relatively high. When the electrode plate in the second region is stressed, a slight slip can occur between layers to release the stress, alleviating deformation of the electrochemical device caused by stress concentration.

公开(公告)号：US20230238665A1

公开(公告)日：2023-07-27

申请号：US18191926

申请日：2023-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Qiuyan WENG ,  Yibo ZHANG ,  Hongmei WEI

IPC: H01M50/538 ,  H01M50/446

CPC classification number: H01M50/538 ,  H01M50/446

Abstract: An electrochemical apparatus includes an electrode assembly. The electrode assembly includes a first electrode plate, a first separation layer, a second electrode plate, and a second separation layer. Along a first direction, the first separation layer includes a first protruding portion extending beyond the second electrode plate, and the second separation layer includes a second protruding portion extending beyond the second electrode plate. The first protruding portion includes a first bonding area, the second protruding portion includes a second bonding area, and adhesion between the first bonding area and the second bonding area is F1, where F1≥5 N/m. Separation layers on two sides of an electrode plate are bonded to prevent the separation layers from shrinking at high temperatures or prevent the separation layers from turning inward at edges due to impact from an electrolyte when the electrochemical apparatus falls, thereby preventing a short circuit.