Patent ID: 11888113
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 9:
10. The secondary battery according to claim 8,
wherein the plurality sets of positive electrodes and negative electrodes further comprise a third negative electrode current collector comprising a fifth region and a fourth negative electrode current collector comprising a sixth region,
wherein the first region, the second region, the third region, the fourth region, the fifth region, the sixth region overlap one another,
wherein the fifth region comprises a ninth surface and a tenth surface opposite to the ninth surface,
wherein the sixth region comprises an eleventh surface and a twelfth surface opposite to the eleventh surface,
wherein the ninth surface of the fifth region is covered with a negative electrode active material layer while the tenth surface of the fifth region is exposed,
wherein the tenth surface of the fifth region faces the eleventh surface of the sixth region, and
wherein the twelfth surface of the sixth region is covered with a negative electrode active material layer while the eleventh surface of the sixth region is exposed.