| abstract |
To ensure the safety of a battery during overcharge without impairing the high-temperature storage characteristics of a non-aqueous electrolyte secondary battery. A non-aqueous electrolyte secondary battery comprising a negative electrode and a positive electrode capable of inserting and extracting lithium, a separator, and a non-aqueous electrolyte containing a non-aqueous solvent and a lithium salt. The separator is made of a porous film made of a thermoplastic resin containing an inorganic filler, and the nonaqueous electrolytic solution contains an aromatic compound having a heat generation property of 1.5 or more. Uses aromatic compounds as secondary battery overcharge inhibitors, combined with specific separators to prevent degradation of battery characteristics due to separator clogging caused by overcharge inhibitor polymer during high temperature storage To do. |