LITHIUM ION POWER STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a lithium ion power storage device in which the negative electrode active material of a negative electrode plate can be reliably doped with lithium ions produced by melting a metallic lithium plate arranged in an electrode group.

SOLUTION: A conductive shielding material 33 has a structure where a negative electrode active material 37 is formed on at least one surface of a metal foil 35 for power collection. Since the conductive shielding material 33 exists between a metallic lithium plate 31 and a positive electrode plate 17, the metallic lithium plate 31 is sandwiched by a negative electrode plate 19 and the negative electrode active material 37 formed on the metal foil 35 for power collection of the conductive shielding material 33. Since the metallic lithium plate does not break through a separator to come into contact with the positive electrode plate, short circuit can be prevented.

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