Patent ID: 11923530
Assignee: NINGDE AMPEREX TECHNOLOGY LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 18:
19. An electronic device, comprising an electrochemical device comprising an aluminum-plastic film and an electrode assembly packaged in the aluminum-plastic film; wherein the electrode assembly comprises a cathode, a separator and an anode; wherein the cathode comprises:
a cathode current collector;
a first cathode active material layer comprising a first cathode active material;
a second cathode active material layer comprising a second cathode active material; wherein the first cathode active material layer is disposed between the cathode current collector and the second cathode active material layer, and the first cathode active material layer directly contacts the second cathode active material layer; wherein the first cathode active material layer is directly disposed on a first region of a surface of the cathode current collector facing an anode active material layer of the anode; wherein a thickness of the first cathode active material layer is greater than Dv50 of the first cathode active material; and
an insulating layer disposed on a second region of the surface of the cathode current collector not facing the anode active material layer of the anode; wherein the electrode assembly is of a wound structure; and
wherein a ratio of the thickness of the first cathode active material layer to a thickness of the insulating layer is from about 0.2 to about 10.