Battery grid with varied corrosion resistance

Patent metadata

Field	Value
Publication number	US-10892491-B2
Application number	US-201715679736-A
Country	US
Kind code	B2
Filing date	Aug 17, 2017
Priority date	Nov 3, 2011
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

A battery grid is disclosed. The battery grid includes a pattern of grid wires. The pattern includes a grid wire having a first segment with a first corrosion resistance and a second segment with a second corrosion resistance which is less than the first corrosion resistance. The second segment corrodes at a rate which is faster than the corrosion rate of the first segment so as to dynamically release internal stress and control grid growth of the battery grid during its service life. A battery includes said grid and a method of forming said grid are also disclosed.

First claim

The invention claimed is:

1. A battery comprising a battery grid having a pattern of grid wires, the pattern including grid wires with one or more deformation segments, wherein the pattern comprises a grid wire having a first deformation segment with a first microstructure and a second deformation segment with a second microstructure which is different from the first microstructure.

2. The battery of claim 1 wherein the second deformation segment is frangible when subjected to the environmental conditions within the battery.

3. The battery of claim 2 wherein the environmental conditions include corrosivity of the battery grid.

4. The battery of claim 2 wherein the environmental conditions include internal stresses resulting from growth of the battery grid within a battery housing.

5. The battery of claim 1 wherein the second deformation segment comprises a lesser corrosion resistance.

6. The battery of claim 1 wherein the second deformation segment comprises a physical property selected from the group consisting of material strength, toughness, ductility, hardness, corrosion resistance, high/low temperature behavior, and wear resistance.

7. The battery of claim 1 , wherein the difference in microstructure is a difference in shape and alignment of the microscopic components of the grid wire.

8. The battery of claim 1 , wherein the difference in microstructure is a difference in density.

9. The battery of claim 1 , wherein the difference in microstructure is a difference in heat treatment.

10. The battery of claim 1 wherein the battery grid has a frame having a top, a first side, a second side, and a bottom, where the top has a lug and the grid wires form a pattern which emanate from a radiant point.

11. The battery of claim 1 , wherein the second deformation segment comprises a re-crystallization of a first crystallized structure of the first deformation segment.

12. The battery of claim 1 , wherein the first microstructure has a first grain density and the second microstructure has a second grain density.

13. The battery of claim 1 , wherein the first microstructure has a first grain direction and the second microstructure has a second grain direction.

14. The battery of claim 1 , wherein the first microstructure has a first grain size and the second microstructure has a second grain size.

Assignees

• Cps Tech Holdings Llc
• Cps Tech Holdings Llp

Inventors

• Taylor M Eric
• Hu Jianxun
• Andersen Glenn W
• Mathews Joseph F
• Sauer Bart William
• Symanski James S
• Xue Feng
• Alkhateeb Mohamadkheir

Classifications

• H01M4/74

  Meshes or woven material; Expanded metal · CPC title

• H01M4/73 Primary

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

• H01M4/82

  Multi-step processes for manufacturing carriers for lead-acid accumulators · CPC title

• H01M4/20

  of pasted electrodes · CPC title

• H01M2300/0011

  Sulfuric acid-based · CPC title