Energy storage cell

An energy storage cell, comprising:

• a first wound electrode assembly including a first positive electrode and a first negative electrode;
• a second wound electrode assembly including a second positive electrode that is not in contact with the first positive electrode and a second negative electrode that is not in contact with the first negative electrode, the second wound electrode assembly being wound around an outer periphery of the first wound electrode assembly about the first wound electrode assembly;
• a case that houses the first wound electrode assembly and the second wound electrode assembly;
• a positive electrode current collector member housed in the case, disposed on one side of the first wound electrode assembly and the second wound electrode assembly in an axial direction of the first wound electrode assembly, and electrically connected to both the first positive electrode and the second positive electrode;
• and
• a negative electrode current collector member housed in the case, disposed on another side of the first wound electrode assembly and the second wound electrode assembly in the axial direction, and electrically connected to both the first negative electrode and the second negative electrode.