| 摘要 |
In a lid for a battery case where an annular thin portion 50 is formed integrally with a lid main body 4 by coining, a pair of ribs 6, 7 formed integrally with the lid main body 4 so as to bulge from the lid main body 4 and extending in a short direction 4a of the lid main body 4 are disposed on both sides of the annular thin portion 50 in a long direction 4b of the lid main body 4. |
