Metal sheet, battery, nickel-zinc battery and method for manufacturing metal sheet

Patent metadata

Field	Value
Publication number	US-2024213496-A1
Application number	US-202218258053-A
Country	US
Kind code	A1
Filing date	Dec 23, 2022
Priority date	Dec 23, 2022
Publication date	Jun 27, 2024
Grant date	—

Abstract

A flat metal sheet has a principal surface located on one side along a thickness direction, a plurality of struts, and a node part where end portions of the plurality of struts are connected to one another. The strut and the node part form a mesh structure, and the plurality of the struts are in close contact with each other.

First claim

1 . A flat metal sheet comprising:
a principal surface located on one side along a thickness direction; a plurality of struts; and a node part where end portions of the plurality of struts are connected to one another, wherein the strut and the node part form a mesh structure, and the plurality of the struts are in close contact with each other.

2 . The metal sheet as claimed in claim 1 , wherein three or more of the plurality of struts are connected to the node part.

3 . The metal sheet as claimed in claim 1 , wherein the strut has a strip shape.

4 . The metal sheet as claimed in claim 1 , wherein the plurality of the struts at a twisted position has a laminated shape.

5 . The metal sheet as claimed in claim 1 , wherein the strut has a thickness greater than or equal to 1 μm and less than or equal to 10 μm.

6 . The metal sheet as claimed in claim 1 , wherein the strut has a length greater than or equal to 50 μm and less than or equal to 500 μm.

7 . The metal sheet as claimed in claim 1 , wherein the strut has a width greater than or equal to 100 μm and less than or equal to 3000 μm.

8 . The metal sheet as claimed in claim 1 , wherein the strut includes a portion having two or more layers and five or less layers of the strut laminated in the thickness direction of the metal sheet.

9 . The metal sheet as claimed in claim 1 , wherein the struts in close contact with each other are slidable at an interface when an external force is applied.

10 . The metal sheet as claimed in claim 1 , wherein a thickness of the metal sheet is greater than or equal to 10 μm and less than or equal to 100 μm.

11 . The metal sheet as claimed in claim 1 , wherein the metal sheet has a plurality of recesses at the principal surface.

12 . The metal sheet as claimed in claim 11 , wherein
the metal sheet has a surface and an interior, the surface includes the principal surface, a back surface located on an opposite side from the principal surface, and an outer peripheral surface of the metal sheet, the interior is covered by the surface, and a diameter of the recess at the principal surface is greater than or equal to 1 μm and less than or equal to 900 μm.

13 . The metal sheet as claimed in claim 11 , wherein a diameter of the recess is not constant in the thickness direction of the metal sheet.

14 . The metal sheet as claimed in claim 11 , wherein a number of the recesses at the principal surface is greater than or equal to 75 and less than or equal to 750 per 500 μm square.

15 . The metal sheet as claimed in claim 1 , wherein the metal sheet has a plurality of through holes at the principal surface penetrating the metal sheet in the thickness direction.

16 . The metal sheet as claimed in claim 15 , wherein the through hole has a hole diameter greater than or equal to 1 μm and less than or equal to 900 μm at the surface of the principal surface.

17 . The metal sheet as claimed in claim 15 , wherein the hole diameter of the through hole is not constant in the thickness direction of the metal sheet.

18 . The metal sheet as claimed in claim 15 , wherein a number of the through holes at the principal surface is greater than or equal to 250 and less than or equal to 2500 per 500 μm square.

19 . The metal sheet as claimed in claim 1 , wherein a porosity is greater than or equal to 10% and less than or equal to 40%.

20 . The metal sheet as claimed in claim 12 , wherein the metal sheet has an independent space in the interior, surrounded by the strut and the node part.

21 - 26 . (canceled)

Assignees

• Sumitomo Electric Industries
• Sumitomo Electric Toyama Co

Inventors

• Takeyama Tomoharu
• Okuno Kazuki
• Majima Masatoshi
• Tsuchida Hitoshi

Classifications

• H01M10/30

  Nickel accumulators (H01M10/34 takes precedence) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/38

  Construction or manufacture · CPC title

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title

• H01M4/75 Primary

  Wires, rods or strips · CPC title