IP Library › Granted Patent US 12,451,493
Granted Patent B2
US 12,451,493 · App. 16/481,355 · Granted Oct 21, 2025

Battery grid

Inventors: Deepan C. Bose (Milwaukee, WI); Jeffrey L. Troxel (Menomonee Falls, WI); Michael E. La Croix; Fabio F. Peluso (Cedarburg, WI)
Assignee: CPS Technology Holdings LLC
H01M4/742H01M4/685H01M4/73H01M50/437H01M50/463H01M2300/0005
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Quick Facts
Patent No.
US 12,451,493
App. No.
16/481,355
Granted
Oct 21, 2025
Kind
B2
Abstract

A grid for an absorbent glass mat lead acid battery is also disclosed. The grid has a frame formed of a top frame element having a current collection lug, a first side frame element, a second side frame element, and a bottom frame element. A plurality of grid wires are arranged in radial configuration within the frame which radial configuration emanates from a radiant point located outside a boundary of the frame. A plurality of horizontal grid wires cross the plurality of grid wires arranged the radial configuration. The grid comprises virgin lead or high purity lead or highly purified secondary lead. An absorbent glass mat lead acid battery is also disclosed.

Claims (51)

1. A grid for an absorbent glass mat lead acid battery comprising:

a frame formed of a top frame element having a current collection lug, a first side frame element, a second side frame element, and a bottom frame element;

the top frame element having a conductive section extended beneath the current collection lug and extended towards the bottom frame element for an increased current to the current collection lug;

a plurality of grid wires, with at least one of the plurality of grid wires having an increased cross-sectional area over its length from a horizontal grid wire, proximate to the bottom frame element, to the top frame element, arranged in at least two radial configurations within the frame, with each of the at least two radial configurations emanating from separate radiant points, a first radiant point and a second radiant point, located outside a boundary of the frame and above the top frame element, the plurality of grid wires comprising:

a first plurality of grid wires having first angles defined by a first intersection of each grid wire of the first plurality of grid wires with a radius line at the first radiant point such that the first plurality of grid wires provides for a first radial configuration;

a second plurality of grid wires, separate from the first plurality of grid wires, having second angles defined by a second intersection of each grid wire of the second plurality of grid wires with the radius line at the second radiant point such that the second plurality of grid wires provides for a second radial configuration, with the radius line extended from the top frame element away from the bottom frame element and the radius line being at least substantially perpendicular to the top frame element;

a distance between adjacent grid wires of the plurality of grid wires being increased in a direction of the first side frame element and the second side frame element starting at a radial grid positioned parallel to the first side frame element and the second side frame element;

wherein the plurality of grid wires extended within a range of approximately 0.5 degrees to approximately 26.5 degrees from the radius line, with one of the plurality of grid wires extended parallel to the first side frame element and the second side frame element;

wherein at least one of the plurality of grid wires joined to one of the first side frame element and the second side frame element; and

wherein a number of the plurality of grid wires increases proximate to the top frame element;

a plurality of horizontal grid wires in intersection with the plurality of grid wires arranged in the at least two radial configurations, wherein each of the plurality of horizontal grid wires continuously extends from the first side frame element to the second side frame element, the at least two radial configurations provide for an increase in a current capacity of the plurality of grid wires;

a plurality of spaces defined by the first intersection and the second intersection and the respective intersections of the plurality of horizontal grid wires and the plurality of grid wires, with the plurality of spaces positioned to provide for a substantially equal potential across a width of the grid, and an area of each respective space of the plurality of spaces decreasing in proximity to the current collection lug, with a density of the plurality of spaces increasing proximal to the current collection lug;

the plurality of spaces being containment areas for an active material positioned on the frame, with an area of the plurality of spaces decreasing proximate to the current collection lug;

a quantity of the plurality of spaces increasing proximate to the current collection lug;

one partial horizontal grid wire separate from the plurality of horizontal grid wires and between the top frame element and the bottom frame element and in extension from one of the first side frame element with at least one of the plurality of spaces bifurcated by the partial horizontal grid wire;

wherein vertically extended grid wires are positioned between one of the plurality of horizontal grid wires and the bottom frame element;

the grid having a thickness with the thickness between 0.5 millimeters and 0.7 millimeters, with the first side frame element and the second side frame element having a thickness between 2 millimeters and 6 millimeters; and

the grid, with the grid being one of a positive grid and a negative grid, being formed from 99.9-99.99% purity lead, wherein a combination the first plurality of grid wires and the second plurality of grid wires and, the plurality of grid wires and the 99.9-99.99% purity lead providing for an increase in a current transfer to the current collection lug.

2. An absorbent glass mat lead acid battery comprising:

a housing having a plurality of electrochemical cells formed by:

a plurality of positive plates each comprising the positive grid and a positive paste thereon;

a plurality of negative plates each comprising the negative grid and a negative paste thereon;

an absorbent glass mat interleaved between each positive plate and each negative plate;

an electrolyte retained by the absorbent glass mat; and

wherein one of the positive grid and negative grid comprises a respective grid of claim 1 .

3. The absorbent glass mat lead acid battery of claim 2 , wherein the positive grid and negative grid each comprise 99.9-99.99% purity lead.

4. The absorbent glass mat lead acid battery of claim 2 , wherein the grid includes a partial horizontal grid wire immediately adjacent the top frame element.

5. The absorbent glass mat lead acid battery of claim 2 , wherein the grid is formed by casting a strip of lead and punching the strip to remove material.

6. The absorbent glass mat lead acid battery of claim 2 , wherein the radially extending grid wires extend within a range of approximately 0.5 degrees to approximately 26.5 degrees from an imaginary line extending perpendicular to top frame of the grid.

7. The absorbent glass mat lead acid battery of claim 6 , wherein each of the separate radiant points is on the radius line running through an imaginary line perpendicular to the top frame element.

8. A lead acid battery wherein both a second positive grid and a second negative grid comprise the grid of claim 1 .

9. The grid of claim 1 , wherein the grid is formed by casting a strip of lead and punching the strip to remove material.

10. A grid for an absorbent glass mat lead acid battery comprising:

a frame formed of a top frame element having a current collection lug, a first side frame element, a second side frame element, and a bottom frame element;

a plurality of grid wires, with at least one of the plurality of grid wires having an increased cross-sectional area over its length from a horizontal grid wire, proximate to the bottom frame element, to the top frame element, arranged within the frame, with the plurality of grid wires in extension from the top frame element and being arranged in at least two radial configurations within the frame, with each of the at least two radial configurations emanating from separate radiant points, a first radiant point and a second radiant point, located outside a boundary of the frame and above the top frame element, the plurality of grid wires comprising:

a first plurality of grid wires having first angles defined by a first intersection of each grid wire of the first plurality of grid wires with a radius line at the first radiant point such that the first plurality of grid wires provides for a first radial configuration;

a second plurality of grid wires, separate from the first plurality of grid wires, having second angles defined by a second intersection of each grid wire of the second plurality of grid wires with the radius line at the second radiant point such that the second plurality of grid wires provides for a second radial configuration, with the radius line extended from the top frame element away from the bottom frame element and the radius line being at least substantially perpendicular to the top frame element; and

wherein a number of the plurality of grid wires increases proximate to the top frame element;

a plurality of horizontal grid wires crossing the plurality of grid wires arranged in the at least two radial configurations, wherein each of the plurality of horizontal grid wires continuously extends from the first side frame element to the second side frame element;

a plurality of spaces defined by the first intersection and the second intersection and the respective intersections of the plurality of horizontal grid wires and the plurality of grid wires, with the plurality of spaces positioned to provide for a substantially equal potential across a width of the grid, and an area of each respective space of the plurality of spaces decreasing in proximity to the current collection lug;

one partial horizontal grid wire separate from the plurality of horizontal grid wires and immediately adjacent the top frame element and in extension from one of the first side frame element for ⅓ of a top frame element length of the top frame element towards the second side frame element, with at least one of the plurality of spaces bifurcated by the one partial horizontal grid wire;

the grid having a thickness with the thickness between 0.5 millimeters and 0.7 millimeters; and

the grid being formed from 99.9-99.99% purity lead.

11. The grid of claim 10 , wherein the grid is a positive grid.

12. The grid of claim 10 , wherein the grid is a negative grid.

13. The grid of claim 10 , wherein the grid is formed by casting a strip of lead and punching the strip to remove material.

14. The grid of claim 10 , wherein the plurality of grid wires extend within a range of approximately 0.5 degrees to approximately 26.5 degrees from the radius line extending perpendicular to the top frame element, with one of the plurality of grid wires extended parallel to the first side frame element and the second side frame element.

15. The grid of claim 10 , wherein a number of the spaces increases proximal to the current collection lug.

16. The grid of claim 10 , wherein vertically extended grid wires are positioned between horizontal grid wire proximate to the bottom frame element and the bottom frame element.

17. The grid of claim 10 , wherein at least one of the plurality of grid wires joined to one of the first side frame element and the second side frame element.

18. The grid of claim 10 , wherein the plurality of spaces are containment areas for an active material positioned on the frame, with an area of the plurality of spaces decreasing proximate to the current collection lug and a quantity of the plurality of spaces increasing proximate to the current collection lug.

Assignments (3)
ABL PATENT SECURITY AGREEMENT Recorded Jul 13, 2023
From: CLARIOS ADVANCED SOLUTIONS LLC; CPS TECHNOLOGY HOLDINGS LLC
To: CITIBANK, N.A., AS COLLATERAL AGENT
Reel/Frame 064272/0566 →
FIRST LIEN PATENT SECURITY AGREEMENT Recorded Jul 13, 2023
From: CLARIOS ADVANCED SOLUTIONS LLC; CPS TECHNOLOGY HOLDINGS LLC
To: CITIBANK, N.A., AS COLLATERAL AGENT
Reel/Frame 064272/0599 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 8, 2019
From: BOSE, DEEPAN CHAKKARAVARTHI; TROXEL, JEFFREY L.; LA CROIX, MICHAEL E.; PELUSO, FABIO F.
To: JOHNSON CONTROLS TECHNOLOGY COMPANY
Reel/Frame 050653/0134 →
Continuity (3)
Provisional Application 62488388 · Apr 21, 2017
Provisional Application 62451590 · Jan 27, 2017
Related Publication 20190393512A1 · Dec 26, 2019
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