NOVELTY - A non-aqueous electrolyte secondary battery (10) comprises electrode assembly including positive electrode sheet (6), negative electrode sheet (7) and separator between them; outer body storing assembly and non-aqueous electrolyte; first conductive pathway from positive sheet to outside of outer body; second conductive pathway from negative sheet to outside of outer body; and current interruption mechanism to interrupt electric current when pressure in outer body exceeds predetermined value, where electrolyte contains overcharge inhibitor in greater than or equal to 3.0% to less than or equal to 4.5%.    USE - As non-aqueous electrolyte secondary battery in vehicle (claimed); as power supply for driving portable electronic equipment such as cell phones, portable personal computers, and portable music players; in electric vehicles (EVs), plug-in hybrid electric vehicles (PHEVs), and hybrid electric vehicles (HEVs).    ADVANTAGE - The non-aqueous electrolyte secondary battery has excellent output characteristics in a low temperature condition and can ensure reliability even when the battery is overcharged through two-step charging in a low temperature condition. The protective layer of inorganic oxide and binder prevents short circuit between the positive electrode sheet and the negative electrode sheet even when an electrically conductive foreign substance enters the electrode assembly, thereby providing non-aqueous electrolyte secondary battery having high reliability.    DETAILED DESCRIPTION - A non-aqueous electrolyte secondary battery (10) comprises an electrode assembly including a positive electrode sheet (6), a negative electrode sheet (7) and a separator interposed between the positive electrode sheet and the negative electrode sheet; an outer body storing the electrode assembly and a non-aqueous electrolyte; a first conductive pathway from the positive electrode sheet to the outside of the outer body; a second conductive pathway from the negative electrode sheet to the outside of the outer body; and a current interruption mechanism that is provided in at least one of the first conductive pathway and the second conductive pathway and interrupts electric current when the pressure in the outer body exceeds a predetermined value, where the non-aqueous electrolyte contains an overcharge inhibitor, and the overcharge inhibitor is contained in an amount of greater than or equal to 3.0% to less than or equal to 4.5% with respect to the spatial volume in the outer body in terms of volume ratio. The non-aqueous electrolyte secondary battery further comprises a gas exhaust valve (4) for exhausting gas in the outer body to the outside of the outer body when the pressure in the outer body exceeds a predetermined value, where the current interruption mechanism works at a pressure lower than that for the gas exhaust valve. The current interruption mechanism works at a pressure of greater than or equal to 0.4 MPa to less than or equal to 1.0 MPa. The positive electrode sheet contains, as the positive electrode active material, a lithium transition-metal composite oxide capable of absorbing and desorbing lithium ions, and the negative electrode sheet contains, as the negative electrode active material, a carbon material capable of absorbing and desorbing lithium ions. INDEPENDENT CLAIMS are included for the following:    (1) a method for manufacturing non-aqueous electrolyte secondary battery involving: preparing an electrode assembly including a positive electrode sheet, a negative electrode sheet, and a separator interposed between the positive electrode sheet and the negative electrode sheet; storing the electrode assembly and a non-aqueous electrolyte containing an overcharge inhibitor in an outer body and adjusting the non-aqueous electrolyte to contain the overcharge inhibitor in an amount of greater than or equal to 3.0% to less than or equal to 4.5% with respect to the spatial volume in the outer body in terms of volume ratio; and sealing up the outer body; and    (2) a vehicle comprising non-aqueous electrolyte secondary battery, where the non-aqueous electrolyte secondary battery includes an electrode assembly including a positive electrode sheet, a negative electrode sheet, and a separator interposed between the positive electrode sheet and the negative electrode sheet, an outer body storing the electrode assembly and a non-aqueous electrolyte, and a current interruption mechanism that is provided in at least one of a conductive pathway from the positive electrode sheet to the outside of the outer body and a conductive pathway from the negative electrode sheet to the outside of the outer body and interrupts electric current when the pressure in the outer body exceeds a predetermined value, where the non-aqueous electrolyte contains an overcharge inhibitor, and the overcharge inhibitor is contained in an amount of greater than or equal to 3.0% to less than or equal to 4.5% with respect to the spatial volume in the outer body in terms of volume ratio.    DESCRIPTION OF DRAWING(S) - The figure shows perspective view of a prismatic lithium ion secondary battery.    Sealing plate (3)    Gas exhaust valve (4)    Sealing member (5)    External positive electrode sheet (6)    External negative electrode sheet (7)    Prismatic lithium ion secondary battery (10)