The invention discloses a soft package battery module. The battery module comprises several battery cell units and an adapter plate. The battery cell units are connected with fixed ends of tabs. A free end of each tab is connected with a welding plate of the adapter plate. The two tabs of the adjacent battery cell units are connected with one welding plate. And/or the free end of each tab is formed by combining at least two bifurcation portions, a first interval gap is formed between the bifurcation portions, or a connecting portion is arranged between the bifurcated portions and the connecting portion and the bifurcation portions form an interval hole and/or a second interval gap. The two bifurcation portions of each tab are connected with the welding plate. In a resistance welding process of the soft package battery module, two welding pins abut against the tabs of the adjacent battery cells on the same welding plate respectively and/or abut against the bifurcation portions of the tabs. In a previous parallel scheme, there is no tab shunting, and in a latter scheme, a current shunted on the surface of the tab is reduced so that welding efficiency is improved and a pin sticking probability of the welding pin and the tab is reduced on the basis of ensuring welding quality.