NONAQUEOUS SECONDARY BATTERY

To provide a nonaqueous secondary battery capable of suppressing an increase in battery resistance due to uneven distribution of a nonaqueous electrolytic solution inside an electrode body.SOLUTION: A nonaqueous secondary battery includes an electrode body 20 in which a positive electrode plate 21, a negative electrode plate 24 and a separator 27 are laminated in a lamination direction, and a nonaqueous electrolytic solution. The value of E is 0.48 or more and 0.69 or less when E=A×B/(C×D) where A [mg/cm2] represents the sum of mass of a negative electrode active material included in a negative electrode mixture layer 26 per unit area on each surface of a negative electrode base material 25, B [nm3] represents an amount of lattice volume change of the negative electrode active material when the nonaqueous secondary battery is charged until a SOC is 100% from 0%, C [N] represents an amount of change of load acting on the electrode body 20 in the lamination direction when the nonaqueous secondary battery is charged until the SOC is 100% from 0%, and D [mm/kN] represents the sum of an inverse of spring constant of the positive electrode plate 21 in the lamination direction and an inverse of spring constant of the separator 27.SELECTED DRAWING: Figure 2 【課題】電極体内部における非水電解液の分布の偏りによる電池抵抗の増加を抑制可能とした非水二次電池を提供する。【解決手段】正極板２１、負極板２４、及びセパレータ２７が積層方向に積層された電極体２０と、非水電解液と、を備え、負極基材２５の各面における単位面積あたりの負極合剤層２６が含む負極活物質の質量の和をＡ〔ｍｇ／ｃｍ２〕とし、ＳＯＣが０％から１００％になるまで充電したときの負極活物質の格子体積変化量をＢ〔ｎｍ３〕とし、ＳＯＣが０％から１００％になるまで充電したときに電極体２０に作用する積層方向の荷重の変化量をＣ〔Ｎ〕とし、積層方向における正極板２１のばね定数の逆数と、セパレータ２７のばね定数の逆数との和をＤ〔ｍｍ／ｋＮ〕とし、Ｅ＝Ａ×Ｂ／（Ｃ×Ｄ）としたときに、Ｅの値は、０．４８以上０．６９以下である。【選択図】図２