Assembly method of fuel cell stack and fuel cell stack

The invention relates to the technical field of fuel cells, and discloses a fuel cell stack assembly method and a fuel cell stack, the method comprises the following steps: S1, measuring the initial thickness t0 of a stack component; s2, applying pressure to the galvanic pile component along the thickness direction of the galvanic pile component until a preset compression amount is reached, and the preset compression amount is 2%-40% of the initial thickness t0; s3, the pre-pressing pressure is relieved; s4, measuring the thickness t'of the electric pile component after prepressing; s5, obtaining a pre-pressing result according to the initial thickness t0 and the thickness t ', and if the pre-pressing result meets a preset requirement, entering S6; if not, entering S2; s6, stacking the stack components, and placing the stack components between the two end plates; s7, applying assembly pressure to the end plates until the preset assembly thickness of the galvanic pile is reached; and mounting a fastening struc