US5071722A
Expired / Lapsed
US
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Process for preparing cadmium hydroxide, and alkaline secondary battery and method for charging the same
Assignee: Japan Storage Battery Co Ltd
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Filing: 1989-11-15
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Granted: 1991-12-10
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Expires: 2009-11-15
Abstract
Abstract The present invention provides a process for easily preparing gamma -Cd(OH)2. The present invention facilitates improvement in the charge/discharge performance and energy density of an alkaline secondary battery having a cadmium electrode including gamma -Cd(OH)2. The present invention provides superrapid-chargeable batteries, such as a nickel-cadmium alkaline secondary battery having a cadmium electrode including gamma -Cd(OH)2 in which the weight of cadmium hydroxide contained in the negative electrode is 0.95 times as much as the weight of nickel hydroxide contained in the positive electrode, a manganese dioxide-cadmium alkaline secondary battery in which the weight of cadmium hydroxide contained in the negative electrode is not more than 0.84 times as much as the weight of manganese dioxide contained in the positive electrode, and a silver oxide-cadmium alkaline secondary battery in which the weight of cadmium hydroxide contained in the negative electrode is not more than 1.36 times as much as the weight of silver contained in the positive electrode.
Inventors
- 👤 Koji Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:59
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/246; C; C01; C01G; C01G11/00; H01M10/00; H01M10/34; H01M10/42; H01M10/44; H01M4/36; H01M4/48; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
24 words
A process for preparing cadmium hydroxide in which cadmium oxide is to react with an alkaline aqueous solution containing hydroxyethylcellulose or water containing hydroxyethylcellulose.
Claim 2
Dependent Claim
24 words
A process for preparing cadmium hydroxide in which cadmium oxide is to react with an alkaline aqueous solution containing hydroxyethylcellulose or water containing hydroxyethylcellulose.
Claim 3
Dependent Claim
27 words
A process for preparing cadmium hydroxide in which a mixture containing hydroxyethylcellulose and cadmium oxide is caused to react with an alkaline aqueous solution containing sodium hydroxide.
Claim 4
Dependent Claim
27 words
A process for preparing cadmium hydroxide in which a mixture containing hydroxyethylcellulose and cadmium oxide is caused to react with an alkaline aqueous solution containing sodium hydroxide.
Claim 5
Dependent Claim
22 words
A process for preparing cadmium hydroxide according to claim 1, in which cadmium oxide is aquated in the presence of metallic cadmium.
Claim 6
Dependent Claim
22 words
A process for preparing cadmium hydroxide according to claim 2, in which cadmium oxide is aquated in the presence of metallic cadmium.
Claim 7
Dependent Claim
57 words
A nickel-cadmium alkaline secondary battery having a nickel hydroxide positive electrode and a cadmium negative electrode, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 0.95 times as much as the weight of nickel hydroxide contained in said positive electrode, and in which γ-Cd(OH) 2 exists in said negative electrode.
Claim 8
Dependent Claim
57 words
A nickel-cadmium alkaline secondary battery having a nickel hydroxide positive electrode and a cadmium negative electrode, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 0.95 times as much as the weight of nickel hydroxide contained in said positive electrode, and in which γ-Cd(OH) 2 exists in said negative electrode.
Claim 9
Dependent Claim
76 words
A manganese dioxide-cadmium alkaline secondary battery having a positive electrode including manganese dioxide as a main active matter and a negative electrode including metallic cadmium as a main active material, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 0.84 times as much as the weight of manganese dioxide contained in said positive electrode when said battery is discharged, and in which γ-Cd(OH) 2 exists in said negative electrode.
Claim 10
Dependent Claim
76 words
A manganese dioxide-cadmium alkaline secondary battery having a positive electrode including manganese dioxide as a main active matter and a negative electrode including metallic cadmium as a main active material, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 0.84 times as much as the weight of manganese dioxide contained in said positive electrode when said battery is discharged, and in which γ-Cd(OH) 2 exists in said negative electrode.
Claim 11
Dependent Claim
94 words
A manganese dioxide-cadmium alkaline secondary battery having a positive electrode including manganese dioxide as a main active material and nickel hydroxide, and a negative electrode including metallic cadmium as a main active material cadmium hydroxide, in which the weight of cadmium hydroxide contained in said negative electrode is not more than the sum of 0.84 times as much as the weight of manganese dioxide and 0.95 times as much as the weight of nickel hydroxide in said positive electrode when said battery is discharged, and in which γ-Cd(OH) 2 exists in said negative electrode.
Claim 12
Dependent Claim
94 words
A manganese dioxide-cadmium alkaline secondary battery having a positive electrode including manganese dioxide as a main active material and nickel hydroxide, and a negative electrode including metallic cadmium as a main active material cadmium hydroxide, in which the weight of cadmium hydroxide contained in said negative electrode is not more than the sum of 0.84 times as much as the weight of manganese dioxide and 0.95 times as much as the weight of nickel hydroxide in said positive electrode when said battery is discharged, and in which γ-Cd(OH) 2 exists in said negative electrode.
Claim 13
Dependent Claim
57 words
A silver oxide-cadmium alkaline secondary battery having a silver oxide positive electrode and a cadmium negative electrode, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 1.36 times as much as the weight of silver contained in said positive electrode, and in which γ-Cd(OH) 2 exists in said negative electrode.
Claim 14
Dependent Claim
57 words
A silver oxide-cadmium alkaline secondary battery having a silver oxide positive electrode and a cadmium negative electrode, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 1.36 times as much as the weight of silver contained in said positive electrode, and in which γ-Cd(OH) 2 exists in said negative electrode.
Claim 15
Independent Claim
94 words
A method for charging a nickel cadmium alkaline secondary battery having a nickel hydroxide positive electrode and a cadmium negative electrode, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 0.95 times as much as the weight of nickel hydroxide contained in said positive electrode, and in which γ-Cd(OH) 2 exists in said negative electrode, in which an initial charging current is established so as to be not more than 1 CA on the basis of the theoretical capacity of cadmium hydroxide contained in the negative electrode.
Claim 16
Independent Claim
94 words
A method for charging a nickel cadmium alkaline secondary battery having a nickel hydroxide positive electrode and a cadmium negative electrode, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 0.95 times as much as the weight of nickel hydroxide contained in said positive electrode, and in which γ-Cd(OH) 2 exists in said negative electrode, in which an initial charging current is established so as to be not more than 1 CA on the basis of the theoretical capacity of cadmium hydroxide contained in the negative electrode.
Claim 17
Independent Claim
112 words
A method for charging a manganese dioxide-cadmium alkaline secondary battery having a positive electrode including manganese dioxide as a main active material and a negative electrode including metallic cadmium as a main active matter, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 0.84 times as much as the weight of manganese dioxide contained in said positive electrode when said battery is discharged, and in which γ-Cd(OH) 2 exists in said negative electrode, in which an initial charging current is established so as to be not more than 1 CA on the basis of the theoretical capacity of cadmium hydroxide contained in the negative electrode.
Claim 18
Independent Claim
112 words
A method for charging a manganese dioxide-cadmium alkaline secondary battery having a positive electrode including manganese dioxide as a main active material and a negative electrode including metallic cadmium as a main active matter, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 0.84 times as much as the weight of manganese dioxide contained in said positive electrode when said battery is discharged, and in which γ-Cd(OH) 2 exists in said negative electrode, in which an initial charging current is established so as to be not more than 1 CA on the basis of the theoretical capacity of cadmium hydroxide contained in the negative electrode.
Claim 19
Independent Claim
131 words
A method for charging a manganese dioxide-cadmium alkaline secondary battery having a positive electrode including manganese dioxide as a main active material and nickel hydroxide, and a negative electrode including metallic cadmium as a main active matter and cadmium hydroxide, in which the weight of cadmium hydroxide contained in said negative electrode is not more than the sum of 0.84 times as much as the weight of manganese dioxide and 0.95 times as much as the weight of nickel hydroxide in said positive electrode when said battery is discharged, and in which γ-Cd(OH) 2 exists in said negative electrode, in which an initial charging current is established so as to be not more than 1 CA on the basis of the theoretical capacity of cadmium hydroxide contained in the negative electrode.
Claim 20
Independent Claim
131 words
A method for charging a manganese dioxide-cadmium alkaline secondary battery having a positive electrode including manganese dioxide as a main active material and nickel hydroxide, and a negative electrode including metallic cadmium as a main active matter and cadmium hydroxide, in which the weight of cadmium hydroxide contained in said negative electrode is not more than the sum of 0.84 times as much as the weight of manganese dioxide and 0.95 times as much as the weight of nickel hydroxide in said positive electrode when said battery is discharged, and in which γ-Cd(OH) 2 exists in said negative electrode, in which an initial charging current is established so as to be not more than 1 CA on the basis of the theoretical capacity of cadmium hydroxide contained in the negative electrode.
Claim 21
Independent Claim
92 words
A method for charging a silver oxide-cadmium alkaline secondary battery having a silver oxide positive electrode and a cadmium negative electrode, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 1.36 times as much as the weight of silver contained in said positive electrode, and which γ-Cd(OH) 2 exists in said negative electrode, in which an initial charging current is established so as to be not more than 1 CA on the basis of the theoretical capacity of cadmium hydroxide contained in the negative electrode.
Claim 22
Independent Claim
92 words
A method for charging a silver oxide-cadmium alkaline secondary battery having a silver oxide positive electrode and a cadmium negative electrode, in which the weight of cadmium hydroxide contained in said negative electrode is not more than 1.36 times as much as the weight of silver contained in said positive electrode, and which γ-Cd(OH) 2 exists in said negative electrode, in which an initial charging current is established so as to be not more than 1 CA on the basis of the theoretical capacity of cadmium hydroxide contained in the negative electrode.
References Cited (Backward Citations)
US4172184A
Cited
US4275127A
Cited
US4614696A
Cited
JPS61240577A
Cited
JPS61240579A
Cited
US4713126A
Cited
JPS63250068A
Cited
JPS63252056A
Cited
US4906539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-09 | 1995-06-10 | 1995-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-09 | 1999-06-10 | 1999-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-09 | 2003-06-10 | 2003-12-10 | $7700.00 | Window Closed / Lapsed |