Method and device for compounding diaphragm and pole piece

The invention provides a compounding method and a compounding device of a diaphragm and a pole piece, a hot cutting process is adopted to cut off a first diaphragm and a second diaphragm, and the cut edges of pole piece units are thermally compounded, so that the cut edges of the pole piece units are tightly adhered together; besides, the non-cut edges of the pole piece units are thermally compounded by adopting a hot ironing process, so that the non-cut edges of the pole piece units are tightly adhered together, namely the hot cutting process and the hot ironing process can tightly adhere the parts, exceeding the piece body area, of the sub-diaphragms (the first diaphragm and the second diaphragm), so that the bonding strength between the edges of the two layers of sub-diaphragms is improved; and the compounding effect of the sub-diaphragm and the pole piece is ensured, so that the problems of subsequent sub-diaphragm turnover, pole piece exposure and the like caused by layered dispersion of the sub-diaphrag