Nag System Co., Ltd.

Hidemasa Nagamine

Keiji Wada

Takahiro Asada

A sealing method that uses an electrostatic energy storage welding machine which includes an energy storage section including a plurality of energy storage parts is provided. A method of sealing a liquid inlet port of a power storage device includes burring in advance a through-hole of the liquid sealing port to raise a hole edge of the through-hole into a form of a projection, wherein the liquid sealing port of the power storage device to be sealed with electrolyte contained therein corresponds to an object to be welded; placing a spherical body that is a lid body on the projection; and performing resistance welding between the projection and the spherical body to seal the liquid inlet port.

Sealing method for liquid inlet port of power storage device

The method for manufacturing a laminated metal foil () according to the present invention includes: a first step of forming, in a weld site (A) of laminated layers of a metal foil (), by the use of a cutter (C) whose longitudinal cross-sectional shape is a substantially V-shape, a notch () that is linear in a planar view and penetrates the laminated layers of the metal foil () in a lamination direction (S), to cause the laminated layers of the metal foil () to bond to each other along the lamination direction (S) at ends () of a linear notch; and a second step of bringing an electrode (E) for resistance welding into press-contact with the weld site (A) and then energizing the weld site (A) via the electrode (E), to perform resistance welding on the laminated metal foil ().

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Settsu, Japan

Hidemasa Nagamine