Patent ID: 11923707
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 7:
8. A power storage device comprising:
a battery cell; and
a switch circuit for controlling charge and discharge of the battery cell,
wherein the switch circuit comprises a mechanical relay, a first transistor, and a second transistor,
wherein the switch circuit has a function of controlling electrical connection between a first terminal and a second terminal,
wherein the mechanical relay has a function of breaking electrical connection between the first terminal and the second terminal,
wherein the first transistor has a function of supplying first current between the first terminal and the second terminal,
wherein the second transistor has a function of supplying second current between the first terminal and the second terminal, and
wherein the first current is higher than the second current.