发明名称 NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
摘要 PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery in which discharge of a nonaqueous electrolyte from a wound electrode body is suppressed when high-rate charge/discharge is performed.SOLUTION: There is provided a nonaqueous electrolyte secondary battery 1 comprising a wound electrode body 20 and a nonaqueous electrolyte. At least one of a positive electrode 30 and a negative electrode 40 of the nonaqueous electrolyte secondary battery 1 comprises active material layers 34, 44 containing an active material, a conductive material and a binder on long collectors 32, 42. The active material layers 34, 44 are divided into first and second end portions b1 and b2 in a length direction at both ends in a width direction and a central portion (a) that is held between the first and second end portions. When a DBP oil absorption amount of the conductive material contained in the central portion (a) is defined as A (ml/100 g) and a DBP oil absorption amount of the conductive material contained in the first and second end portions b1 and b2 is defined as B (ml/100 g), A and B satisfy an expression of 100≤B<A≤450.SELECTED DRAWING: Figure 3
申请公布号 JP2016225223(A) 申请公布日期 2016.12.28
申请号 JP20150112622 申请日期 2015.06.02
申请人 TOYOTA MOTOR CORP 发明人 UMEYAMA HIROYA;TANIGUCHI AKIHIRO;TSUTSUMI SHUJI;HASHIMOTO TATSUYA
分类号 H01M4/13;H01M4/62;H01M10/0566;H01M10/0587 主分类号 H01M4/13
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