| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylindrical battery excellent in safety and productivity.SOLUTION: In an alkaline cell 1 (cylindrical battery) where a gap 201 is formed between the peripheral side face 32b at a dish-shaped part of a negative electrode terminal plate 32, and the edge 11a of a positive electrode can 11 curved (curled) by caulking, and including a washer 50 having a washer boss 52a and an annular flange 50c provided around the end face above the washer boss 52a, and being assembled to the opening of the positive electrode can 11 by fitting the washer boss 52a to the gap 201, a gas vent structure (gas vent 50d) for discharging the gas, discharged from the first gas vent 32a of the negative electrode terminal plate 32 to the gap 201, to the outside of the alkaline cell 1 from the gap 201 is provided in a range surrounded by a ridgeline connecting the highest part 11b of the curved (curled) edge 11a of the positive electrode can 11 and the peripheral side face 32b of the negative electrode terminal plate 32.SELECTED DRAWING: Figure 2 |
