BATTERY AND MANUFACTURING METHOD OF THE SAME

The present invention relates to a battery (200) which includes an electrode group (100). The electrode group (100) includes a positive electrode (10), a separator (30), a negative electrode (20), and a protective layer (410). The separator (30) is interposed between the positive electrode (10) and...

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Bibliographic Details
Main Authors YAMAZAKI NOBUYUKI, ISHISHITA TERUO, KAITA KEIJI, TANABE YUKINARI, TAKAGI MASARU
Format Patent
LanguageEnglish
Korean
Published 30.11.2018
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Summary:The present invention relates to a battery (200) which includes an electrode group (100). The electrode group (100) includes a positive electrode (10), a separator (30), a negative electrode (20), and a protective layer (410). The separator (30) is interposed between the positive electrode (10) and the negative electrode (20). The positive electrode (10) includes a positive electrode collector (11), a positive electrode composite layer (12), and a positive electrode tab (13), wherein the positive electrode composite layer (12) is disposed on the surface of the positive electrode collector (11), and the positive electrode tab (13) is electrically connected to the positive electrode collector (11). The protective layer (410) covers the surface of the positive electrode tab (13). The volume resistivity of the protective layer (410) is in a range of 1 to 100 times the volume resistivity of the positive electrode composite layer (12). The present disclosure provides the battery in which foreign substances mixed between a protective tape of the positive electrode tab and the negative electrode can be detected in a withstand voltage test. 전지 (200) 는, 전극군 (100) 을 적어도 포함한다. 전극군 (100) 은, 정극 (10) 과 세퍼레이터 (30) 와 부극 (20) 과 보호층 (410) 을 포함한다. 세퍼레이터 (30) 는, 정극 (10) 과 부극 (20) 사이에 개재하고 있다. 정극 (10) 은, 정극 집전체 (11) 와 정극 합재층 (12) 과 정극 탭 (13) 을 포함한다. 정극 합재층 (12) 은, 정극 집전체 (11) 의 표면에 배치되어 있다. 정극 탭 (13) 은, 정극 집전체 (11) 에 전기적으로 접속되어 있다. 보호층 (410) 은, 정극 탭 (13) 의 표면을 덮고 있다. 보호층 (410) 의 체적 저항률은, 정극 합재층 (12) 의 체적 저항률의 1 배 이상 100 배 이하의 범위이다.
Bibliography:Application Number: KR20180056313