US4166155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Maintenance-free battery
Assignee: GNB Inc
•
Filing: 1978-07-03
•
Granted: 1979-08-28
•
Expires: 1998-07-03
Abstract
Abstract The present invention provides a maintenance-free battery having improved performance characteristics and utilizing a unique, hybrid combination of ternary alloys for the positive and negative grids. The positive grids are formed from a ternary, lead base alloy consisting essentially of lead, from about 1.0 to about 2.0% antimony and from about 1.2 to about 2.2% cadmium, the cadmium being present in an amount at least equal to the amount of antimony present; and the negative grids are formed from a ternary lead base alloy consisting essentially of lead, from 0.06 to about 0.20% calcium and from about 0.10 to about 0.40% tin, the percentages of each alloy being based on the alloy weight.
Inventors
- 👤 George W. Mao
- 👤 Purushothama Rao
- 👤 James F. Trenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:05
CPC Classifications
C; C22; C22C; C22C11/00; C22C11/02; H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/68; H01M4/685; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
165 words
In a maintenance-free lead-acid battery comprising a battery container having a plurality of cells, a cover sealed to the container, venting means providing passages for the escape of evolved gas and an electrolyte contained in the cells, each cell having components including a plurality of positive and negative electrodes disposed therein comprising a grid supporting structure having a layer of active material attached thereto, the improvement wherein the grid supporting structure of the positive electrodes are formed from a ternary lead base alloy consisting essentially of lead, from about 1.0 to about 2.0% antimony and from about 1.2 to about 2.2% cadmium, the cadmium being present in an amount at least equal to the amount of antimony present, and the grid supporting structure of the negative electrodes are formed from a ternary lead base alloy consisting essentially of lead, from about 0.06 to about 0.20% calcium and from about 0.10 to about 0.40% tin, the percentages of each alloy being based on the alloy weight.
Claim 2
Dependent Claim
165 words
In a maintenance-free lead-acid battery comprising a battery container having a plurality of cells, a cover sealed to the container, venting means providing passages for the escape of evolved gas and an electrolyte contained in the cells, each cell having components including a plurality of positive and negative electrodes disposed therein comprising a grid supporting structure having a layer of active material attached thereto, the improvement wherein the grid supporting structure of the positive electrodes are formed from a ternary lead base alloy consisting essentially of lead, from about 1.0 to about 2.0% antimony and from about 1.2 to about 2.2% cadmium, the cadmium being present in an amount at least equal to the amount of antimony present, and the grid supporting structure of the negative electrodes are formed from a ternary lead base alloy consisting essentially of lead, from about 0.06 to about 0.20% calcium and from about 0.10 to about 0.40% tin, the percentages of each alloy being based on the alloy weight.
Claim 3
Dependent Claim
22 words
The maintenance-free battery of claim 1 wherein the cadmium in the alloy for the positive electrodes is present in a slight excess.
Claim 4
Dependent Claim
36 words
The maintenance-free battery of claim 2 wherein the cadmium is present in an amount of from about 1.2 to about 1.8% and the antimony is present in an amount of from about 1.0 to about 1.5%.
Claim 5
Dependent Claim
34 words
The maintenance-free battery of claim 2 wherein the alloy for negative electrodes includes calcium in an amount of from about 0.11 to 0.15% and tin in an amount of from about 0.20 to 0.30%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-27 | 1983-02-26 | 1983-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-27 | 1987-02-26 | 1987-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-27 | 1991-02-26 | 1991-08-28 | $7700.00 | Window Closed / Lapsed |