| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that an unsafe phenomenon occurs when an abnormality accompanying an increase in internal pressure, such as gas generation, occurs inside a rectangular nonaqueous electrolyte secondary battery. <P>SOLUTION: The rectangular nonaqueous electrolyte secondary battery includes a wound group 6 in which a positive electrode and a negative electrode are flatly wound via a separator, and a battery container 5 housing the wound group 6. The wound group 6 has planar portions and curved portions forming a flat shape. The battery container 5 has protrusions 8 on inner walls thereof facing the curved portions of the wound group 6. <P>COPYRIGHT: (C)2013,JPO&INPIT |
