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Surface-treated steel sheet for battery cases, method of producing same, battery case, and battery
US9017862B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9017862-B2 |
| Application number | US-201214131306-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 4, 2012 |
| Priority date | Jul 7, 2011 |
| Publication date | Apr 28, 2015 |
| Grant date | Apr 28, 2015 |
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- Title
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Abstract
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A surface-treated steel sheet for battery cases is provided which comprises a nickel-cobalt alloy layer formed at the outermost surface of a plane to be an inner surface of a battery case. When X-ray diffraction measurement using CuKα as a radiation source is performed for the nickel-cobalt alloy layer, an intensity ratio I A /I B =0.01 to 0.9. The intensity ratio I A /I B is a ratio of an intensity I A of a peak present at a diffraction angle 2θ within a range of 41° or more and less than 43° to an intensity I B of a peak present at a diffraction angle 2θ within a range of 43° or more and 45° or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A surface-treated steel sheet for battery cases, comprising a nickel-cobalt alloy layer formed at the outermost surface of a plane to be an inner surface of a battery case, wherein when X-ray diffraction measurement using CuKα as a radiation source is performed for the nickel-cobalt alloy layer, an intensity ratio I A /I B is within a range of 0.01 to 0.9, the intensity ratio I A /I B is a ratio of an intensity I A of a peak present at a diffraction angle 2θ within a range of 41° or more and less than 43° to an intensity I B of a peak present at a diffraction angle 2θ within a range of 43° or more and 45° or less. 2. The surface-treated steel sheet for battery cases as set forth in claim 1 , further comprising a nickel layer as an underlying layer for the nickel-cobalt alloy layer. 3. The surface-treated steel sheet for battery cases as set forth in claim 1 , further comprising an iron-nickel diffusion layer between the nickel-cobalt alloy layer and a steel sheet. 4. A battery case configured by shape-forming the surface-treated steel sheet for battery cases as set forth in claim 1 . 5. A battery configured using the battery case as set forth claim 4 . 6. A method of producing a surface-treated steel sheet for battery cases, the surface-treated steel sheet comprising a nickel-cobalt alloy layer formed at the outermost surface of a plane to be an inner surface of a battery case, wherein the nickel-cobalt alloy layer is formed by alloy plating using a nickel-cobalt alloy plating bath which is prepared such that a molar ratio of cobalt/nickel is 0.01 to 2.4 under a condition of a bath temperature of 60° C. to 80° C. and a current density of 15 to 40 A/dm 2 .
Assignees
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Classifications
Hardness · CPC title
Thickness · CPC title
Metals · CPC title
- B32B15/013Primary
one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium · CPC title
two or more layers being of nickel or chromium, e.g. duplex or triplex layers · CPC title
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- What does patent US9017862B2 cover?
- A surface-treated steel sheet for battery cases is provided which comprises a nickel-cobalt alloy layer formed at the outermost surface of a plane to be an inner surface of a battery case. When X-ray diffraction measurement using CuKα as a radiation source is performed for the nickel-cobalt alloy layer, an intensity ratio I A /I B =0.01 to 0.9. The intensity ratio I A /I B is a ratio of an int…
- Who is the assignee on this patent?
- Horie Shinichirou, Tomomori Tatsuo, Yoshioka Koh, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B32B15/013. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 28 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).