Energy storage cell

Abstract

To further improve energy density.SOLUTION: In a power storage cell 1, a first electrode 11N of a wound electrode body 10 includes: a sheet-like collector 111N; and an electrode mixture layer 112N formed on the collector 111N. The collector 111N includes: a coated part 111NA which is coated with the electrode mixture layer 112N; and an uncoated part 111NB which is not coated with the electrode mixture layer 112N. The uncoated part 111NB protrudes from the coated part 111NA to one side in an axial direction Z of the wound electrode body 10. A case 20 houses the wound electrode body 10. The case 20 includes a cylindrical wall part 22 and a bottom part 23. The cylindrical wall part 22 is provided so as to cover an outer peripheral side of the wound electrode body 10. The bottom part 23 is disposed on one side in the axial direction Z and is connected to one end of the cylindrical wall part 22. The bottom part 23 is bonded to the uncoated part 111NB by welding from the outside of the case 20.SELECTED DRAWING: Figure 1

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