Composite current collector, battery cell and battery

The utility model belongs to the technical field of batteries, and particularly relates to a composite current collector, a battery cell and a battery. Wherein the composite current collector comprises an outer supporting layer, a non-Newtonian fluid layer and an inner supporting layer; the inner supporting layer, the non-Newtonian fluid layer and the outer supporting layer are sequentially arranged from inside to outside in the thickness direction of the composite current collector. According to the utility model, hard objects can be hindered and intercepted, so that the damage to the inner supporting layer is effectively reduced and even avoided, and the stability of the structure is 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、电芯及电池；其中，所述复合集流体包括外支撑层、非牛顿流体层和内支撑层；所述内支撑层、所述非牛顿流体层和所述外支撑层沿着所述复合集流体的厚度方向从内到外依次设置。本实用新型能够实现对硬物的阻碍拦截作用，进而有效地减少甚至避免对内支撑层的损坏，并且提高结构的稳定性。