IP Library › Granted Patent US 11,670,823
Granted Patent B2
US 11,670,823 · App. 16/646,469 · Granted Jun 6, 2023

Separator for alkaline cells

Inventors: M. Edgar Armacanqui (Middleton, WI); Andrew J. Roszkowski (Middleton, WI); Donald Raymond Crowe (Middleton, WI); Enqing Zhu (St. Louis, MO); John L. Hadley (Madison, WI); Matthew Hennek (Stoughton, WI); Tim F. Turba (St. Louis, MO)
Assignee: Energizer Brands, LLC
H01M50/44H01M4/244H01M4/42H01M50/414H01M50/489H01M2004/021H01M2004/023H01M2004/027H01M2300/0014
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Quick Facts
Patent No.
US 11,670,823
App. No.
16/646,469
Granted
Jun 6, 2023
Kind
B2
Abstract

An alkaline electrochemical cell includes a cathode; a gelled anode having an anode active material and an electrolyte; and a separator disposed between the cathode and the anode; wherein the separator includes a non-conductive, porous material having a mean pore size of about 1 micron to about 5 microns, a maximum pore size of about 19 microns, and an air permeability of about 0.5 cc/cm 2 /s to about 3.8 cc/cm 2 /s at 125 Pa.

Claims (9)

1. An alkaline electrochemical cell separator comprising a non-conductive, porous, fibrous, alkaline resistant material, wherein the separator has a mean pore size of about 0.5 micron to about 3.8 microns, a maximum pore size of about 19 microns, an air permeability of about 0.5 cc/cm 2 /s to about 3.8 cc/cm 2 /s at 125 Pa, and a dry thickness of about 20 microns to about 150 microns.

2. The alkaline electrochemical cell separator of claim 1 , wherein the non-conductive, porous, fibrous material is non-woven.

3. The alkaline electrochemical cell separator of claim 2 , wherein the non-conductive, porous, fibrous material comprises polyvinyl alcohol.

4. The alkaline electrochemical cell separator of claim 1 , wherein the non-conductive, porous, fibrous material comprises polyvinyl alcohol.

5. The alkaline electrochemical cell separator of claim 1 , wherein the separator has an air permeability of from about 500 cc/cm 2 /min to about 3000 cc/cm 2 /min, at 1 KPa.

6. The alkaline electrochemical cell separator of claim 1 , wherein the separator has a basis weight of about 20 g/m 2 to about 32 g/m 2 .

7. The alkaline electrochemical cell separator of claim 1 , wherein the separator has a dry thickness of from about 60 microns to about 120 microns.

8. The alkaline electrochemical cell separator of claim 1 , wherein the separator is permeable to hydroxide ions and water.

9. An alkaline electrochemical cell separator comprising a non-conductive, porous, fibrous, alkaline resistant material, wherein the separator has a mean pore size of about 0.5 micron to about 3.8 microns, a maximum pore size of about 19 microns, and an air permeability of about 240 cc/cm 2 /min to about 1824 cc/cm 2 /min, at 1 KPa.

Assignments (3)
AMENDED AND RESTATED INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Mar 19, 2025
From: ENERGIZER BRANDS, LLC; ENERGIZER AUTO, INC.,; ENERGIZER AUTO SALES, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 070565/0282 →
PATENT SECURITY AGREEMENT Recorded Dec 30, 2020
From: ENERGIZER BRANDS, LLC; ENERGIZER AUTO, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 054875/0651 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 2, 2020
From: ARMACANQUI, M. EDGAR; ROSZKOWSKI, ANDREW J.; CROWE, DONALD RAYMOND; ZHU, ENQING; HADLEY, JOHN L.; HENNEK, MATTHEW; TURBA, TIM F.
To: ENERGIZER BRANDS, LLC
Reel/Frame 054513/0886 →