Method for testing all solid state battery, method for producing all solid state battery, and method for producing battery pack

Abstract

A method for testing an all solid state battery with which the presence of short circuit or the presence of defect causing short circuit can be detected with high accuracy by a comparatively simple method in which a voltage is applied to a battery and the current value thereof is measured. The method comprising steps of: a resistance increasing step of increasing resistance of an all solid state battery to 3.2*10Ω·cmor more: a voltage applying step of applying voltage to an all solid state battery of which the resistance is increased; and a judging step of judging acceptability of the all solid state battery based on a current value measured in the voltage applying step; and the voltage applying step includes a first voltage applying treatment of applying voltage Vi, a second voltage applying treatment of applying voltage V2 corresponding to the reverse voltage of the voltage Vi after the first voltage applying treatment, and a third voltage applying treatment of applying voltage V3 corresponding to the reverse voltage of the voltage V2 after the second voltage applying treatment; and in the judging step, acceptability of the all solid state battery is judged based on current value Ci and current value C3 measured when the voltage Vi and the voltage V3 are applied.