NONAQUEOUS LIQUID ACTIVE MATERIAL BATTERY

摘要

PURPOSE:To increase the explosion-proof function of a battery by specifying the area of the thin part installed in the bottom of a battery case. CONSTITUTION:In a battery using an alkali metal such as lithium in a negative electrode 11 and thionyl chloride as a positive active material, an explosion- proof thin part 4 comprising a plurality of grooves 3 having inverted trapezoid cross section and one or more intersecting points is formed in the bottom 2 of a battery container 1. The area of the thin part 4 is specified to 0.7-5.2% of that of the bottom 2. By limiting the area of the thin part 4 within the above range, the blocking of the opening caused by the contents of the battery when the thin part is burst can be prevented. The explosion-proof function can stably demonstrated.