| 发明名称 |
SEALED SECONDARY BATTERY |
| 摘要 |
A sealed secondary battery comprises a bottomed cylindrical battery case having an opening, a sealing member sealing the opening of the battery case, and a spiral electrode assembly in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween, and an annular thin portion is formed in the bottom of the battery case, and the ratio of the area of a region surrounded by the annular thin portion to the area of the bottom portion of the battery case is equal to or more than 10%, and a volume energy density is equal to or more than 500 Wh/L. |
| 申请公布号 |
US2015132625(A1) |
申请公布日期 |
2015.05.14 |
| 申请号 |
US201314397703 |
申请日期 |
2013.09.18 |
| 申请人 |
SANYO Electric Co., Ltd. |
发明人 |
Miyata Kyosuke;Inoue Koki |
| 分类号 |
H01M2/02;H01M4/131;H01M10/04 |
主分类号 |
H01M2/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A sealed secondary battery comprising:
a bottomed cylindrical battery case having an opening; a sealing member sealing the opening of the battery case; and a spiral electrode assembly in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween, wherein an annular thin portion is formed in the bottom of the battery case, and the ratio of the area of a region surrounded by the annular thin portion to the area of the bottom portion of the battery case is equal to or more than 10%, and a volume energy density is equal to or more than 500 Wh/L. |
| 地址 |
Moriguchi-shi, Osaka JP |
