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发明公开
CN107112597A 圆筒形非水电解质二次电池 无效 - 撤回

圆筒形非水电解质二次电池
摘要：
对于圆筒形非水电解质二次电池，在负极活性物质包含硅化合物的情况下实现提高寿命。圆筒形非水电解质二次电池(10)包括：有底筒状的壳主体(12)，其用于收容电极体(30)；以及封口体(20)，其用于将壳主体(12)的开口部封住。电极体(30)具有包含负极活性物质的负极(32)，负极活性物质具有含硅(Si)的化合物。封口体(20)具有电流切断机构(23)，该电流切断机构(23)具有上阀体(24)和配置在上阀体(24)的下侧并与上阀体(24)接合的下阀体(26)，由于在上阀体与下阀体之间所形成的空间内的气体压力增大而切断电流路径。壳主体(12)的底部具有薄壁部(13)，该薄壁部(13)形成环的至少一部分，并且，底部中的除薄壁部(13)以外的部分的厚度t为0.25mm
摘要（英）：

The present invention aims to improve the service life of a cylindrical nonaqueous electrolyte secondary battery in cases where the negative electrode active material thereof contains a silicon compound. This cylindrical nonaqueous electrolyte secondary battery (10) comprises: a bottomed cylindrical case main body (12) which houses an electrode body (30); and a cover body (20) which closes an opening of the case main body (12). The electrode body (30) comprises a negative electrode (32) that comprises a negative electrode active material, and the negative electrode active material contains a compound containing silicon (Si). The cover body (20) comprises a current interrupting mechanism (23) which comprises an upper valve body (24) and a lower valve body (26) that is arranged below the upper valve body (24) and is bonded to the upper valve body (24), and which blocks the current path by means of a rise in the gas pressure within a space that is formed between the upper valve body and the lower valve body. The bottom part of the case main body (12) has a thin portion (13) that constitutes at least a part of a ring, and the portion other than the thin portion (13) of the bottom part has a thickness t satisfying 0.25 mm

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