US 11,699,824 B2
Nickel-plated, heat-treated steel sheet for battery cans
Kota Sadaki, Yamaguchi (JP); and Koh Yoshioka, Yamaguchi (JP)
Assigned to TOYO KOHAN CO., LTD., Tokyo (JP)
Filed by TOYO KOHAN CO., LTD., Tokyo (JP)
Filed on Sep. 11, 2020, as Appl. No. 17/18,675.
Application 17/018,675 is a division of application No. 15/780,862, granted, now 10,873,061, previously published as PCT/JP2016/086121, filed on Dec. 5, 2016.
Claims priority of application No. JP2015-236710 (JP), filed on Dec. 3, 2015.
Prior Publication US 2021/0028415 A1, Jan. 28, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 50/124 (2021.01); C25D 7/00 (2006.01); C23C 28/02 (2006.01); C23C 10/20 (2006.01); C23C 10/30 (2006.01); C23C 10/02 (2006.01); C23C 10/18 (2006.01); C23C 10/28 (2006.01); C25D 5/48 (2006.01); B32B 15/04 (2006.01); C23C 10/08 (2006.01); C23C 30/00 (2006.01); B32B 15/18 (2006.01); B32B 15/01 (2006.01); C23C 10/60 (2006.01); H01M 50/107 (2021.01); H01M 50/213 (2021.01); C25D 7/06 (2006.01); H01M 50/119 (2021.01); H01M 50/133 (2021.01); H01M 50/134 (2021.01); H01M 50/145 (2021.01); C25D 5/50 (2006.01); C25D 3/12 (2006.01); H01M 50/131 (2021.01)
CPC H01M 50/124 (2021.01) [B32B 15/013 (2013.01); B32B 15/015 (2013.01); B32B 15/04 (2013.01); B32B 15/043 (2013.01); B32B 15/18 (2013.01); C23C 10/02 (2013.01); C23C 10/08 (2013.01); C23C 10/18 (2013.01); C23C 10/20 (2013.01); C23C 10/28 (2013.01); C23C 10/30 (2013.01); C23C 10/60 (2013.01); C23C 28/02 (2013.01); C23C 28/021 (2013.01); C23C 28/023 (2013.01); C23C 30/00 (2013.01); C23C 30/005 (2013.01); C25D 3/12 (2013.01); C25D 5/48 (2013.01); C25D 5/50 (2013.01); C25D 7/00 (2013.01); C25D 7/0614 (2013.01); H01M 50/107 (2021.01); H01M 50/119 (2021.01); H01M 50/1245 (2021.01); H01M 50/133 (2021.01); H01M 50/134 (2021.01); H01M 50/145 (2021.01); H01M 50/213 (2021.01); B32B 2250/03 (2013.01); B32B 2311/22 (2013.01); B32B 2311/30 (2013.01); B32B 2439/00 (2013.01); H01M 50/1243 (2021.01); H01M 50/131 (2021.01); Y02E 60/10 (2013.01); Y10T 428/12937 (2015.01); Y10T 428/12944 (2015.01); Y10T 428/12951 (2015.01); Y10T 428/12958 (2015.01); Y10T 428/12965 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/12979 (2015.01); Y10T 428/12993 (2015.01); Y10T 428/2495 (2015.01); Y10T 428/24942 (2015.01); Y10T 428/24967 (2015.01); Y10T 428/24975 (2015.01); Y10T 428/263 (2015.01); Y10T 428/264 (2015.01); Y10T 428/265 (2015.01); Y10T 428/27 (2015.01)] 7 Claims
OG exemplary drawing
 
1. A nickel-plated heat-treated steel sheet for a battery can, comprising:
an iron-nickel diffusion layer formed on a first surface of a steel sheet to be an inner surface of the battery can,
a first nickel layer constituting an outermost layer with a nickel amount of 4.4 to 26.7 g/m2 on the iron-nickel diffusion layer, and
a second nickel layer constituting an outermost layer on a second surface of the steel sheet to be an outer surface of the battery can,
wherein when an Fe intensity and a Ni intensity are continuously measured along a depth direction from the first surface of the nickel-plated heat-treated steel sheet for a battery can, by using a high frequency glow discharge optical emission spectrometric analyzer, a difference (D2-D1) between a depth (D1) at which the Fe intensity exhibits a first predetermined value and a depth (D2) at which the Ni intensity exhibits a second predetermined value is less than 0.04 μm,
wherein the depth (D1) exhibiting the first predetermined value is the depth exhibiting an intensity of 10% of a saturated value of the Fe intensity measured by the above-described measurement, and
the depth (D2) exhibiting the second predetermined value is the depth exhibiting an intensity of 10% of a maximum value when the measurement is further performed along the depth direction after the Ni intensity shows the maximum value by the above-described measurement,
wherein the outermost layer on the iron-nickel diffusion layer consists of nickel and the outermost layer on the second surface of the steel sheet consists of nickel.