| 发明名称 | Square lithium secondary battery | ||
| 摘要 | A square lithium secondary battery includes a wound body in which a collective sheet in which a positive electrode sheet and a negative electrode sheet overlap each other with a first separator interposed therebetween is wound while a second separator is put inside the collective sheet. An active material mixture layer on one or both surfaces of at least one of the positive electrode sheet and the negative electrode sheet includes a region with a plurality of openings and a region with no opening. At least a bent portion of the collective sheet is covered with the region with the plurality of openings. | ||
| 申请公布号 | US8927127(B2) | 申请公布日期 | 2015.01.06 |
| 申请号 | US201213689938 | 申请日期 | 2012.11.30 |
| 申请人 | Semiconductor Energy Laboratory Co., Ltd. | 发明人 | Hosoya Kunio;Kimura Kunio |
| 分类号 | H01M4/00;H01M10/052;H01M10/0587;H01M4/38;H01M2/02 | 主分类号 | H01M4/00 |
| 代理机构 | Nixon Peabody LLP | 代理人 | Nixon Peabody LLP ;Costellia Jeffrey L. |
| 主权项 | 1. A battery comprising: a positive electrode sheet; a negative electrode sheet; and a separator interposed between the positive electrode sheet and the negative electrode sheet, wherein the positive electrode sheet, the negative electrode sheet, and the separator are wound, so that each of the positive electrode sheet, the negative electrode sheet, and the separator includes a bent portion, wherein the bent portion of one of the positive electrode sheet and the negative electrode sheet includes a plurality of openings, and wherein a distance between the plurality of openings is gradually decreased closer to a portion having the smallest radius of curvature in the bent portion. | ||
| 地址 | Kanagawa-ken JP | ||