A battery pack has a plurality of batteries, a bus bar connected to electrode terminals of the plurality of batteries, a terminal connected to the bus bar, and an electric wire connected to the terminal. The terminal has a first base portion, a second base...

Provided is an ultrasonic horn (510) that can reduce the likelihood of damaging a plurality of stacked sheets of metal foil when the stacked sheets of metal foil and a metal member are ultrasonically bonded by applying ultrasonic vibration to the stacked s...

A solid electrolyte sheet capable of increasing rigidity near an end surface of the solid electrolyte sheet, and a solid electrolyte secondary battery used with the solid electrolyte sheet are provided. A solid electrolyte sheet 10 includes a base 11 forme...

A battery pack 1 includes a battery 100, a control member (a control board 401) that controls the battery 100, a communication line (an electric wire 405) conducted to the control board 401, a covering member 422 that covers the electric wire 405, and a fa...

Provided are a battery module which can be efficiently inspected without applying an electrical load to the battery module and a method for inspecting the battery module. This battery module has a unit cell 13 equipped with a battery container 13a accommod...