| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem of a negative electrode active material layer that there is a place where lithium is precipitated easily, and thereby it is required to estimate the lithium precipitation amount while taking account of this point.SOLUTION: A negative electrode active material layer (12b) has a facing portion (G1) facing a positive electrode active material layer (13b), and a non-facing portion (G2) not facing the positive electrode active material layer. The negative electrode active material layer is divided into a first region (H1) including the boundary of the facing portion and non-facing portion, and a second region (H2) including only the facing portion, and different from the first region. Based on the negative electrode potential at the boundary, the lithium precipitation amount in the first region is calculated. Based on the negative electrode potential when assumed that the reaction current in the second region is constant, the lithium precipitation amount in the second region is calculated. |
