IP Library › Granted Patent US 6,960,409
Granted Patent B2
US 6,960,409 · App. 09/950,308 · Granted Nov 1, 2005

High discharge rate alkaline battery

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Quick Facts
Patent No.
US 6,960,409
App. No.
09/950,308
Granted
Nov 1, 2005
Kind
B2
Abstract

The present invention provides a primary alkaline battery having a cathode made of porous manganese dioxide, wherein a significant portion of the total pore volume of the manganese dioxide comprises pores which are large. Preferably, at least thirty percent of the total pores of the manganese dioxide are greater than substantially sixty Angstroms. The use of large pore manganese dioxide increases the discharge output and time of the battery, and further decreases manufacturing problems related to die pressing cathode rings from manganese dioxide by reducing the “spring back” or “bounce back” of the manganese dioxide as measured in the die set and after being removed from the die set.

Claims (5)

1. An alkaline electrochemical cell, comprising a cathode, an anode, a separator disposed between the cathode and the anode, and an aqueous electrolyte contacting the cathode, the anode and the separator, the cathode comprising porous electrolytic manganese dioxide having a pore volume, at least six and six tenths percent of the pore volume being attributable to pores having a pore opening size of substantially sixty angstroms or greater.

2. The electrochemical cell as defined in claim 1 , wherein the electrochemical cell is selected from the group consisting of AA batteries, AAA batteries, AAAA batteries, C batteries, D batteries, and 9-Volt batteries.

3. The electrochemical cell as defined in claim 1 , wherein the size is determined using a desorption isotherm test.

4. The electrochemical cell as defined in claim 1 , at least thirty percent of the total pore volume being attributable to pores having a pore opening size of substantially sixty angstroms or greater.

5. The electrochemical cell as defined in claim 1 , at least thirty-six percent of the total pore volume being attributable to pores having a pore opening size of substantially sixty angstroms or greater.

Assignments (7)
NOTICE OF SUCCESSOR AGENT AND ASSIGNMENT OF SECURITY INTEREST (INTELLECTUAL PROPERTY) REEL/FRAME 036131/0272 Recorded Jun 5, 2018
From: DEUTSCHE BANK AG NEW YORK BRANCH
To: ROYAL BANK OF CANADA
Reel/Frame 046301/0425 →
SECURITY INTEREST Recorded Jul 20, 2015
From: SPECTRUM BRANDS, INC.
To: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT
Reel/Frame 036131/0272 →
RELEASE OF SECURITY INTEREST Recorded Jul 14, 2015
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL TRUSTEE
To: APPLICA CONSUMER PRODUCTS, INC.; APPLICA CONSUMER PRODUCTS, INC., A CORP. OF FLORIDA; KWIKSET CORPORATION; LIQUID HOLDING COMPANY, INC.; NATIONAL MANUFACTURING CO.; PRICE PFISTER, INC.; ROV HOLDING, INC., A CORP. OF DELAWARE; ROVCAL, INC.; ROVCAL, INC., A CORP. OF CALIFORNIA; RUSSELL HOBBS, INC., A CORP. OF DELAWARE; SALIX ANIMAL HEALTH, LLC; SEED RESOURCES, L.L.C.; SPECTRUM BRANDS, INC.; SPECTRUM BRANDS, INC. AS SUCCESSOR IN INTEREST TO ROVCAL, INC.; SPECTRUM BRANDS, INC., A CORP. OF DELAWARE; TELL MANUFACTURING, INC.; TETRA HOLDING (US), INC., A CORP. OF DELAWARE; TETRA HOLDINGS (US), INC.; UNITED INDUSTRIES CORPORATION; UNITED INDUSTRIES CORPORATION AS SUCCESSOR IN INTEREST TO LIQUID HOLDING COMPANY, INC.; UNITED PET GROUP, INC.; UNITED PET GROUP, INC., A CORP. OF DELAWARE
Reel/Frame 036102/0001 →
MERGER Recorded Nov 10, 2014
From: ROVCAL, INC.
To: SPECTRUM BRANDS, INC.
Reel/Frame 034136/0718 →
PATENT SECURITY AGREEMENT Recorded Dec 28, 2012
From: SPECTRUM BRANDS, INC.; UNITED INDUSTRIES CORPORATION; UNITED PET GROUP, INC.; APPLICA CONSUMER PRODUCTS, INC.; ROVCAL, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION
Reel/Frame 029536/0634 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 14, 2009
From: GOLDMAN SACHS CREDIT PARTNERS L.P.
To: THE BANK OF NEW YORK MELLON, AS COLLATERAL AGENT
Reel/Frame 022951/0236 →
SECURITY AGREEMENT Recorded Jun 27, 2007
From: AQUARIA, INC.; AQUARIUM SYSTEMS, INC.; UNITED PET GROUP, INC.; SPECTRUM BRANDS, INC. (FORMERLY KNOWN AS RAYOVAC CORPORATION); ROVCAL, INC.; SOUTHERN CALIFORNIA FOAM, INC.; TETRA HOLDING (US), INC.; UNITED INDUSTRIES CORPORATION
To: GOLDMAN SACHS CREDIT PARTNERS L.P., AS COLLATERAL AGENT
Reel/Frame 019477/0974 →