Short circuit inspection method for all-solid-state battery assembly, restraint jig used therefor, kit for short circuit inspection, and method for manufacturing all-solid-state battery

Abstract

According to one aspect of the present invention, a short circuit inspection method for an all solid battery assembly is provided which includes: a step of preparing an all-solid-state battery assembly; a step of preparing a restraint jig including a pair of restraint plates sandwiching the all-solid-state battery assembly in the thickness direction, and a restraint member including a bolt and a nut, wherein where a smallest thermal expansion coefficient among the thermal expansion coefficient of the positive electrode current collector and the thermal expansion coefficient of the negative electrode current collector of the all-solid-state battery assembly is denoted by α1, the thermal expansion coefficients of the bolt and the nut are each equal to or greater than α1; a step of restraining the all-solid-state battery assembly; a step of increasing the resistance of the all-solid-state battery assembly by cooling; a step of applying a voltage to the all-solid-state battery assembly and measuring a current; and a step of determining whether or not a short circuit has occurred in the all-solid-state battery assembly on the basis of the measured current value.