| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery capable of preventing the deterioration of battery characteristics caused by a swelling of power generating element 1 due to concave parts 21a, 22a of aluminum laminate sheets 21, 22 curved outward when inner pressure of the battery is increased, by forming lower faces and side faces of the concave parts 21a, 22a in dome shape in advance. SOLUTION: On a battery case 2 formed by making the concave parts 21a, 22a of the aluminum laminate sheets 21, 22 face each other and laying one on the other, and housing a winding-type power generating element 1 in the concave parts 21a, 22a facing each other, side faces of the concave parts 21a, 22a of the aluminum laminate sheets 21, 22 running along a winding axis of the power generating element 1 are formed into dome shape like cylindrical face or ellipsoidal cylinder face. COPYRIGHT: (C)2006,JPO&NCIPI |
