NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Provided is a non-aqueous electrolyte secondary battery having excellent properties even at low temperatures. The non-aqueous electrolyte secondary battery comprises: an electrode assembly including a positive electrode plate and a negative electrode plate; a non-aqueous electrolyte; an exterior body having an opening, and accommodating the electrode assembly and the non-aqueous electrolyte; and a sealing plate for sealing the opening of the exterior body, wherein the negative electrode plate has a negative electrode core and a negative electrode active material layer formed on the negative electrode core, and the non-aqueous electrolyte contains a non-aqueous solvent, the non-aqueous solvent containing 50-80 vol% of a chain carbonate with respect to the non-aqueous solvent, and containing, as the chain carbonate, 30-40 vol% of dimethyl carbonate, 3-8 vol% of propylene carbonate, and 2-5 vol% of methyl propionate with respect to the non-aqueous solvent.