Method for manufacturing bipolar power storage device

Abstract

A method for manufacturing a bipolar power storage device includes a first depressurizing process in which an internal space is depressurized to a first pressure through an attachment, a first liquid injecting process in which a predetermined amount of electrolyte solution is injected into the internal space from a holding member through an liquid injection port by increasing the pressure in the holding member, a second depressurizing process in which a part of the electrolyte solution flows back from the internal space to the holding member by depressurizing the internal space to a second pressure, and a second liquid injecting process in which the electrolyte solution is injected into the internal space by increasing the pressure in the holding member. The second depressurizing process includes an initial depressurizing process in which the internal space is depressurized at a depressurizing speed lower than a depressurizing speed in the first depressurizing process.