NOVELTY - A non-aqueous secondary battery comprises flat-shaped electrode body consisting of positive electrode, negative, and separator in which positive electrode protrusion part without positive mix layer is formed on one end side of width direction of electrode body, and positive electrode electrical power collector protrudes from separator and has positive electrode terminal junction part (11) to which a part (16) of positive electrode protrusion part is compressed into thickness direction of electrode body, and positive electrode terminal (12) is joined.    USE - A non-aqueous secondary battery for vehicles.    ADVANTAGE - Increase of battery temperature can be suppressed, and energy density can be improved.    DETAILED DESCRIPTION - A non-aqueous secondary battery comprises flat-shaped electrode body consisting of positive electrode, negative, and separator in which positive electrode protrusion part without positive mix layer is formed on one end side of width direction of electrode body, and positive electrode electrical power collector protrudes from separator and has positive electrode terminal junction part (11) to which a part (16) of positive electrode protrusion part is compressed into thickness direction of electrode body, and positive electrode terminal (12) is joined. The battery capacity per non-aqueous secondary battery is 3-5 Ah. Thickness of electrode body (T), thickness of positive electrode terminal junction part (t), and distance (L) between positive electrode protrusion part side edge part (17) of positive mix layer and positive electrode terminal junction part satisfy formula (L/(T-t)) greater than or equal to 0.85.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional diagram of an electrode body after partial decompression of non-aqueous secondary battery. (Drawing includes non-English language text).    Positive electrode terminal junction part (11)    Positive electrode terminal (12)    Positive electrode compression part (16)    Positive electrode protrusion part side edge part of positive mix layer (17)    Distance between positive electrode protrusion part side edge part of positive mix layer and positive electrode terminal junction part (L)    Thickness of electrode body (T)    Thickness of positive electrode terminal junction part (t)