To provide a combining method of an electronic material structure body, capable of simply reducing dispersion of physical properties among electronic material structure body groups.
The combining method of a positive electrode member 11 in a manufacturing device 2 of a battery pack is equipped with steps S1 and S4 of measuring at least one physical property value, regarding a plurality of respective positive electrode members 11, and steps S3 and S6 of obtaining one power generating element 10, by selecting a prescribed number of the positive electrode members 11 from the plurality of the positive electrode members 11 and combining them so that the physical property values of the overall power generation element 10, which are calculated based on the physical property values of the plurality of the positive electrode members 11 measured in the steps S1 and S4, in order to constitute the power generation elements 10, by combining the prescribed number of the positive electrode members 11 are within a prescribed range.
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