BATTERY PACK, POWER STORAGE DEVICE, POWER STORAGE SYSTEM, ELECTRONIC APPARATUS, ELECTRIC VEHICLE, AND POWER SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a battery pack, power storage device, power storage system, electronic apparatus, electric vehicle, and power system capable of more accurately detecting voltage of a plurality of battery cells.SOLUTION: A power storage device comprises a connection terminal part that is joined to terminal faces of a plurality of battery cells constituting a battery row, and is disposed so that the longer direction of the connection terminal part is in parallel with the row direction of the battery row. The connection terminal part comprises: a joint part composed of a first joint part to which one battery row is joined and a second joint part to which another battery row adjacent to the one battery row is joined; and an extension part extending from one end of the joint part in the longer direction. The extension part is provided at a predetermined position.