| 摘要 |
Provided is a wound secondary battery which is capable of sufficiently dissipating the heat generated in an electrode plate group to the outside of the battery at high temperatures, while preventing dissipation of the heat at low temperatures. An electrode plate group (3) is configured by winding a positive electrode plate (19) and a negative electrode plate (21), which are laminated with separators (15, 17) interposed therebetween, around an axial core (23) that is composed of a long metal inner core part (37) and an outer core part (39) that is provided outside the inner core part (37) and formed of an insulating material. The insulating material constituting the outer core part (39) has a heat conductivity of 1-20 W/mk. |
