Kabushiki Kaisha Toyota Jidoshokki

Hidaka Yamada

Motoaki Okuda

Atsushi Minagata

Kyoichi Kinoshita

Yohei Hamaguchi

Yusuke Yamaguchi

A power storage device manufacturing method that seals a case housing an electrode assembly of a power storage device and injects an electrolyte into the case after sealing, the method includes a step accompanied by a pressure operation of increasing or reducing a pressure inside the case after sealing the case, and a process performed in a state of turning the inside of the case to the pressure higher or lower than an atmospheric pressure, and an internal space capacity of the case is measured based on a change with time of the pressure inside the case caused by the pressure operation inside the case.

Power storage device manufacturing method, manufacturing device, liquid injection device, and liquid injection method

An electricity storage device includes an electrode assembly configured such that first and second electrodes are layered. The electrode assembly includes two tab groups in each of which tabs of the first electrodes or the second electrodes having the same polarity are bundled. Each tab group and a conductive member are welded with each other by a welding portion. The welding portion has a mixed portion configured by mixing at least one of a metal that forms metal foils and a metal that forms the conductive member with a dissimilar metal that is different from the metal of the metal foils and has a higher electric resistivity than that of the metal of the metal foils.

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Kariya, Japan

Hidaka Yamada