US4003754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetic alkaline storage battery
Assignee: VARTA Batterie AG
•
Filing: 1975-08-14
•
Granted: 1977-01-18
•
Expires: 1995-08-14
Abstract
Abstract Alkaline storage battery cells having negative electrodes with higher capacity than the positive electrodes. The positive electrodes have discharge limiting capacity. The negative electrodes have additive of Raney metal, or Raney metal alloy. Such cells constituting a battery.
Inventors
- 👤 August Winsel
- 👤 Eckart Buder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:23
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/362; H01M4/364; H01M10/00; H01M10/34; H01M4/24; H01M2004/026; H01M2004/027; H01M4/62; H01M4/621; H01M4/64; H01M4/66; H01M4/661; H01M4/70; H01M4/72; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
87 words
In an alkaline storage battery cell which is hermetically sealed, and which includes a negative electrode having higher capacity than the positive electrode, the improvement wherein the positive electrode is constructed and arranged to provide a capacity which is limiting during discharging, and the negative electrode includes additive selected from the group of reduced Raney metal and Raney metal alloy of one or more metals in Group VIII of the periodic table, the additive being present in a quantity sufficient to conduct the maximum polarity reversal current.
Claim 2
Dependent Claim
87 words
In an alkaline storage battery cell which is hermetically sealed, and which includes a negative electrode having higher capacity than the positive electrode, the improvement wherein the positive electrode is constructed and arranged to provide a capacity which is limiting during discharging, and the negative electrode includes additive selected from the group of reduced Raney metal and Raney metal alloy of one or more metals in Group VIII of the periodic table, the additive being present in a quantity sufficient to conduct the maximum polarity reversal current.
Claim 3
Dependent Claim
12 words
The cell of claim 1 wherein the selected additive includes Raney nickel.
Claim 4
Dependent Claim
33 words
The cell of claim 1 wherein the additive is selected from the group of Raney nickel, Raney nickel iron, Raney nickel cobalt, Raney nickel with palladium alloy, and Raney nickel with platinum alloy.
Claim 5
Dependent Claim
14 words
The cell of claim 1 wherein the electrodes are substantially free of anitpolar mass.
Claim 6
Dependent Claim
22 words
The cell of claim 1 wherein the additive is present in an amount greater than about 0.25 grams/ampere of polarity reversal current.
Claim 7
Dependent Claim
14 words
The cell of claim 1 wherein the negative electrode also includes a hydrophobic medium.
Claim 8
Dependent Claim
11 words
The cell of claim 1 which has nickel and cadmium electrodes.
Claim 9
Dependent Claim
11 words
The cell of claim 1 which has nickel and iron electrodes.
Claim 10
Dependent Claim
12 words
A battery formed of a plurality of cells according to claim 1.
Claim 11
Dependent Claim
35 words
The cell of claim 4 which is assembled by a process comprising the steps of introducing the positive electrode in substantially discharged condition, and introducing the negative electrode with oxidized Raney nickel and oxidized cadmium.
Claim 12
Dependent Claim
31 words
The cell of claim 2 which is assembled by a process comprising the steps of introducing the positive electrode in substantially charged condition and the negative electrode in substantially reduced condition.
Claim 13
Dependent Claim
17 words
The cell of claim 5 wherein the additive is present in an amount of about 1 gram/ampere.
Claim 14
Dependent Claim
18 words
The cell of claim 10 wherein the negative electrode introduced in the assembly process further contains unoxidized cadmium.
Claim 15
Dependent Claim
17 words
The cell of claim 13 whose assembly process comprises the further step of charging at elevated temepratures.
Claim 16
Dependent Claim
33 words
The cell of claim 11 whose assembly process comprises the further step of removing hydrogen from the negative electrode by exposing said electrode to an alkaline medium at temperatures above about 40° C.
Claim 17
Dependent Claim
84 words
In the method of producing an alkaline storage battery cell which is hermetically sealed, which includes a negative electrode having higher capacity than the positive electrode and which is subject to polarity reversal during deep discharging the improvement which comprises the step of incorporating in the negative electrode additive selected from the group of reduced Raney metal and Raney metal alloy of one or more metals in Group VIII of the periodic table in a quantity sufficient to conduct the maximum polarity reversal current.
Claim 18
Dependent Claim
84 words
In the method of producing an alkaline storage battery cell which is hermetically sealed, which includes a negative electrode having higher capacity than the positive electrode and which is subject to polarity reversal during deep discharging the improvement which comprises the step of incorporating in the negative electrode additive selected from the group of reduced Raney metal and Raney metal alloy of one or more metals in Group VIII of the periodic table in a quantity sufficient to conduct the maximum polarity reversal current.
Claim 19
Dependent Claim
21 words
The method of claim 16 wherein the additive is incorporated in a quantity sufficient to conduct the maximum polarity reversal current.
Claim 20
Dependent Claim
15 words
The method of claim 16 wherein the electrodes are formed substantially free of antipolar mass.
Claim 21
Dependent Claim
33 words
The method of claim 16 further comprising the steps of introducing the positive electrode into the cell in substantially discharged condition, and introducing the negative electrode with oxidized Raney nickel and oxidized cadmium.
Claim 22
Dependent Claim
13 words
The method of claim 16 further comprising charging the cell at elevated temperatures.
Claim 23
Dependent Claim
26 words
The method of claim 16 wherein the positive electrode is introduced into the cell in substantially charged condition and the negative electrode in substantially reduced condition.
Claim 24
Dependent Claim
30 words
The method of claim 16 further comprising the step of removing hydrogen from the negative electrode by exposing said electrode to an alkaline medium at temperatures above about 40° C.
Claim 25
Dependent Claim
14 words
The method of claim 19 further comprising incorporating unoxidized cadmium into the negative electrode.
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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |