Composite current collector, battery cell structure and battery

The utility model belongs to the technical field of batteries, and particularly relates to a composite current collector, a battery cell structure and a battery. Wherein the composite current collector comprises an outer conductive layer, a base film layer and an inner conductive layer which are sequentially arranged from outside to inside; a communicating cavity is formed in the base film layer; a conductive filling layer is arranged in the communicating cavity; and the conductive filling layer is respectively connected with the outer conductive layer and the inner conductive layer. According to the utility model, the internal resistance of the composite current collector can be reduced, and the conductivity can be improved. 本实用新型属于电池技术领域，具体涉及一种复合集流体、电芯结构及电池；其中，所述复合集流体包括从外到内依次设置的外导电层、基膜层和内导电层；所述基膜层内设有连通腔体；所述连通腔体内设有导电填充层；并且所述导电填充层分别连接于所述外导电层和所述内导电层。本实用新型能够减小复合集流体的内阻，并且可以提高导电性能。