公开(公告)号：US20210066729A1

公开(公告)日：2021-03-04

申请号：US16964825

申请日：2019-02-20

Applicant: NIPPON STEEL CORPORATION

Inventor： Hideya KAMINAKA ,  Koichi NOSE ,  Yoshitaka NISHIYAMA ,  Junko IMAMURA ,  Haruka SATO ,  Yuya TAKASHIMA

IPC: H01M8/0228 ,  H01M8/0206 ,  H01M8/0213 ,  H01M8/0215

Abstract: A titanium material includes a base material made of pure titanium or a titanium alloy; and a carbon layer covering a surface of the base material. The carbon layer includes non-graphitizable carbon, and has an R value (I1350/I1590) of 2.0 or more and 3.5 or less in the Raman spectroscopy using laser having a wavelength of 532 nm. Where I1350 is peak intensity at a wave number of around 1.35×105 m−1 in a Raman spectrum, and I1590 is peak intensity at a wave number of around 1.59×105 m−1 in a Raman spectrum. According to this titanium material, it is possible to realize low contact resistance by the carbon layer. Moreover, this titanium material is not susceptible to surface oxidation and capable of maintaining low contact resistance even when exposed to noble potential.

公开(公告)号：US20220216548A1

公开(公告)日：2022-07-07

申请号：US17608418

申请日：2020-06-10

Applicant: NIPPON STEEL CORPORATION

Inventor： Akinobu KOBAYASHI ,  Koichi NOSE ,  Yasuto GOTO ,  Takehiro TAKAHASHI ,  Tatsuo NAGATA ,  Masaharu IBARAGI

IPC: H01M50/124 ,  H01M50/103 ,  H01M50/169 ,  H01M50/164 ,  H01M50/15

Abstract: A battery case and method of production of the same realizing smaller size, higher mountability, longer service life, and lower cost than in the past, that is, a battery case comprising a container body and a container cover, in which battery case, one or both of the container body and the container cover are made from a laminated steel sheet comprised of a plated steel sheet on which a film having a polyolefin-based resin as a main constituent is laminated, a joined part of the container body and the container cover has a welded part of the plated steel sheet, a melt bonded part of the film, and a gap part between the welded part and the melt bonded part, where a length of gap part/thickness of plated steel sheet ≤10.0 and a length of gap part/length of joined part