ELECTRIC POWER STORAGE SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a power storage system whose lifetime can be elongated.

SOLUTION: The power storage system includes a battery pack 2 which has at least one lithium secondary cell using manganese positive electrode material, and a control device 3 which controls charge and discharge of the battery pack 2, wherein the control device 3 controls the charge and discharge within a range of voltage causing less degradation, the range of voltage being set on the basis of a target battery degradation rate.

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