| 摘要 |
An object of the present invention is to provide a new method for performing deterioration determination of a lithium ion secondary battery. In order to attain the object, in the present invention, there is provided a electric storage device (10) including a battery unit (11) including a plurality of battery cells which are connected to each other, a charge and discharge control unit (12) controlling charge and discharge of the plurality of battery cells, a cell balance unit (13) performing balance processing which corrects a difference in a cell voltage between the plurality of battery cells, and a determination unit (14) performing deterioration determination of each of the plurality of battery cells in a state in which the balance processing is disabled when the charge and discharge based on the control of the charge and discharge control unit (12) is not performed for greater than or equal to a predetermined period of time. |
