| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a secondary battery having satisfactory handling property, which can improve production tact, exhibit the airtightness of a battery can, and increase a battery capacity. <P>SOLUTION: The secondary battery comprises an electrode group 1 and an outer packaging case 11 housing the electrode group, and is hermetically sealed after filling an electrolyte in the inside of a battery can 10 composed of the outer packaging case 11 and a lid member 12. The battery can 10 includes an electrode group housing part formed in shape of a substantially rectangular parallelepiped, and a peripheral edge section duplex-winding the outer packaging case 11 and the lid member 12 tightly to seal them up. The peripheral edge section is arranged projecting outwards from the electrode group housing part and is composed to have an appropriate corner R to exhibit airtightness corresponding to the tightly duplex-wound plate thickness. <P>COPYRIGHT: (C)2013,JPO&INPIT |
