Valve regulated lead-acid battery

Patent metadata

Field	Value
Publication number	US-2016254570-A1
Application number	US-201415028904-A
Country	US
Kind code	A1
Filing date	Oct 3, 2014
Priority date	Oct 15, 2013
Publication date	Sep 1, 2016
Grant date	—

Abstract

A valve regulated lead-acid battery includes a positive electrode current collector which is a punched current collector obtained by punching a rolled sheet of lead alloy and in which the average interlayer distance in a layered current collector structure at a cross-section parallel to the rolling direction and along the thickness direction of the current collector is not less than 25 μm and not more than 180 μm.

First claim

1 . A valve regulated lead-acid battery comprising: a positive electrode current collector and a positive active material; a negative electrode current collector and a negative active material; and a liquid holding body, wherein the positive electrode current collector is a punched current collector obtained by punching a rolled sheet of lead alloy, and the average interlayer distance of a layered current collector structure at a cross-section of the current collector in a thickness direction is not less than 25 μm and not more than 180 μm.

2 . A valve regulated lead-acid battery comprising: a positive electrode current collector and a positive active material; a negative electrode current collector and a negative active material; and a liquid holding body, wherein the positive electrode current collector is a punched current collector obtained by punching a rolled sheet of lead alloy, and the average interlayer distance in a layered current collector structure at a cross-section parallel to the rolling direction and along the thickness direction of the current collector is not less than 25 μm and not more than 180 μm.

3 . The valve regulated lead-acid battery according to claim 1 , wherein the positive electrode current collector is composed of a Pb—Ca—Sn alloy, and where x is a Ca content and y is a Sn content in terms of mass %, the requirements of 0.03≦x≦0.09 and 9.16x+0.525≦y≦2.0 are satisfied.

4 . The valve regulated lead-acid battery according to claim 1 , wherein the positive electrode current collector includes a crosspiece having a rectangular cross-section, and has a frame on four sides.

5 . The valve regulated lead-acid battery according to claim 1 , wherein the average interlayer distance in the layered current collector structure is not less than 50 μm and not more than 180 μm.

6 . The valve regulated lead-acid battery according to claim 1 , wherein the average interlayer distance in the layered current collector structure is not less than 25 μm and not more than 150 μm.

7 . The valve regulated lead-acid battery according to claim 1 , wherein the average interlayer distance in the layered current collector structure is not less than 50 μm and not more than 150 μm.

8 . The valve regulated lead-acid battery according to claim 1 , which is used in stationary applications such as those of emergency power supply units in hospitals and factories, and small UPSs (uninterruptible power sources).

9 . A method for producing a valve regulated lead-acid battery using the positive electrode current collector which is a punched current collector obtained by punching a rolled sheet of lead alloy and in which the average interlayer distance in a layered current collector structure at a cross-section parallel to the rolling direction and along the thickness direction of the current collector is not less than 25 μm and not more than 180 μm, and a positive active material; a negative electrode current collector and a negative active material; and a liquid holsojd body.

10 . A method for producing a valve regulated lead-acid battery using the positive electrode current collector which is a punched current collector obtained by punching a rolled sheet of lead alloy prepared in such a manner that the rolling reduction ratio is 60 to 90% and in which the average interlayer distance in a layered current collector structure at a cross-section parallel to the rolling direction and along the thickness direction of the current collector is not less than 25 μm and not more than 180 μm, and a positive active material; a negative electrode current collector and a negative active material; and liquid holding body.

11 . The valve regulated lead-acid battery according to claim 2 , wherein the positive electrode current collector includes a crosspiece having a rectangular cross-section, and has a frame on four sides.

12 . The valve regulated lead-acid battery according to claim 2 , wherein the average interlayer distance in the layered current collector structure is not less than 50 μm and not more than 180 μm.

13 . The valve regulated lead-acid battery according to claim 2 , wherein the average interlayer distance in the layered current collector structure is not less than 25 μm and not more than 150 μm.

14 . The valve regulated lead-acid battery according to claim 2 , wherein the average interlayer distance in the layered current collector structure is not less than 50 μm and not more than 150 μm.

15 . The valve regulated lead-acid battery according to claim 2 , which is used in stationary applications such as those of emergency power supply units in hospitals and factories, and small UPSs (uninterruptible power sources).

Assignees

• Gs Yuasa Int Ltd

Inventors

• Matsumura Tomoko

Classifications

• H01M10/06

  Lead-acid accumulators (semi-lead accumulators H01M10/20) · CPC title

• H01M4/73

  for lead-acid accumulators, e.g. frame plates · CPC title

• H01M4/685

  Lead alloys · CPC title

• H01M2220/10

  Batteries in stationary systems, e.g. emergency power source in plant · CPC title

• H01M10/121 Primary

  Valve regulated lead acid batteries [VRLA] · CPC title