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US5032475A
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US
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Nickel-metal hydride secondary cell
Assignee: Toshiba Corp
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Filing: 1990-09-18
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Granted: 1991-07-16
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Expires: 2010-09-18
Abstract
Abstract A nickel-metal hydride secondary cell comprising a non-sinter type nickel positive electrode accommodated in an enclosure and comprised of a conductive core and a layer formed on the conductive core, the layer made of a mixture of nickel hydroxide power and cobalt monoxide powder covered with a layer of high-valence cobalt oxide, a hydrogen absorbing alloy negative electrode accommodated in the enclosure and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and carbon black having a specific surface area of 700 m 2 /g or more, and having a capacity 1.0 to 2.5 times the sum of the capacity of the nickel hydroxide contained in the positive electrode and the electricity required to oxidize the cobalt monoxide powder, a separator made of synthetic resin unwoven fabric having a texture size of 50 to 100 g/m 2 and a thickness of 0.1 to 0.25 mm, and located between the positive electrode and the negative electrode, and alkali electrolyte contained in the enclosure.
Inventors
- 👤 Hiroyuki Hasebe
- 👤 Kazuta Takeno
- 👤 Kiyoshi Mitsuyasu
- 👤 Yuji Sato
- 👤 Hiroyuki Takahashi
- 👤 Hirotaka Hayashida
- 👤 Ichirou Sawatari
- 👤 Koji Ishiwa
- 👤 Katuyuki Hata
- 👤 Kazuhiro Yoshida
- 👤 Kunihiko Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:46
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/52; H01M10/00; H01M10/34; H01M10/345; H01M4/62; H01M4/624; H01M4/625; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
175 words
A nickel-metal hydride secondary cell comprising: a non-sinter type nickel positive electrode accommodated in an enclosure and comprised of a conductive core and a layer formed on the conductive core, said layer made of a mixture of nickel hydroxide powder and cobalt monoxide powder covered with a layer of high-valence cobalt oxide; a hydrogen absorbing alloy negative electrode accommodated in said enclosure and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and carbon black having a specific surface area of 700 m 2/ g or more, and having a capacity 1.0 to 2.5 times the sum of the capacity of the nickel hydroxide contained in said positive electrode and the electricity required to oxidize the cobalt monoxide powder; a separator made of synthetic resin unwoven fabric having a texture size of 50 to 100 g/m 2 and a thickness of 0.1 to 0.25 mm, and located between said positive electrode and said negative electrode; and alkali electrolyte contained in said enclosure.
Claim 2
Dependent Claim
175 words
A nickel-metal hydride secondary cell comprising: a non-sinter type nickel positive electrode accommodated in an enclosure and comprised of a conductive core and a layer formed on the conductive core, said layer made of a mixture of nickel hydroxide powder and cobalt monoxide powder covered with a layer of high-valence cobalt oxide; a hydrogen absorbing alloy negative electrode accommodated in said enclosure and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and carbon black having a specific surface area of 700 m 2/ g or more, and having a capacity 1.0 to 2.5 times the sum of the capacity of the nickel hydroxide contained in said positive electrode and the electricity required to oxidize the cobalt monoxide powder; a separator made of synthetic resin unwoven fabric having a texture size of 50 to 100 g/m 2 and a thickness of 0.1 to 0.25 mm, and located between said positive electrode and said negative electrode; and alkali electrolyte contained in said enclosure.
Claim 3
Dependent Claim
55 words
A secondary cell according to claim 1, wherein a current of 0.05 to 1 CmA is supplied to charge the cell initially, for a period during which an amount of electricity is applied which is 1.5 times or more the electricity required to oxidize the cobalt monoxide contained in said positive electrode into cobalt oxy-hydroxide.
Claim 4
Dependent Claim
157 words
A nickel-metal hydride secondary cell comprising: a non-sinter type nickel positive electrode accommodated in an enclosure and comprised of a conductive core and a layer formed on the conductive core, said layer made of a mixture of nickel hydroxide powder and cobalt monoxide powder covered with a layer of high-valence cobalt oxide; a hydrogen absorbing alloy negative electrode accommodated in said enclosure and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and carbon black having a specific surface area of 700 m 2/ g or more, and having a capacity 1.0 to 2.5 times the sum of the capacity of the nickel hydroxide contained in said positive electrode and the electricity required to oxidize the cobalt monoxide powder; a separator made of synthetic resin unwoven fabric and located between said positive electrode and said negative electrode; and alkali electrolyte contained in said enclosure.
Claim 5
Dependent Claim
157 words
A nickel-metal hydride secondary cell comprising: a non-sinter type nickel positive electrode accommodated in an enclosure and comprised of a conductive core and a layer formed on the conductive core, said layer made of a mixture of nickel hydroxide powder and cobalt monoxide powder covered with a layer of high-valence cobalt oxide; a hydrogen absorbing alloy negative electrode accommodated in said enclosure and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and carbon black having a specific surface area of 700 m 2/ g or more, and having a capacity 1.0 to 2.5 times the sum of the capacity of the nickel hydroxide contained in said positive electrode and the electricity required to oxidize the cobalt monoxide powder; a separator made of synthetic resin unwoven fabric and located between said positive electrode and said negative electrode; and alkali electrolyte contained in said enclosure.
Claim 6
Dependent Claim
55 words
A secondary cell according to claim 3, wherein a current of 0.05 to 1 CmA is supplied to charge the cell initially, for a period during which an amount of electricity is applied which is 1.5 times or more the electricity required to oxidize the cobalt monoxide contained in said positive electrode into cobalt oxy-hydroxide.
Claim 7
Dependent Claim
164 words
A nickel-metal hydride secondary cell comprising: a non-sinter type nickel positive electrode accommodated in an enclosure and comprised of a conductive core and a layer formed on the conductive core, said layer made of a mixture of nickel hydroxide powder and cobalt monoxide powder covered with a layer of high-valence cobalt oxide; a hydrogen absorbing alloy negative electrode accommodated in said enclosure and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and conductive material powder and having a capacity 1.0 to 2.5 times the sum of the capacity of the nickel hydroxide contained in said positive electrode and the electricity required to oxidize the cobalt monoxide powder; a separator made of synthetic resin unwoven fabric having a texture size of 50 to 100 g/m 2 and a thickness of 0.1 to 0.25 mm, and located between said positive electrode and said negative electrode; and alkali electrolyte contained in said enclosure.
Claim 8
Dependent Claim
164 words
A nickel-metal hydride secondary cell comprising: a non-sinter type nickel positive electrode accommodated in an enclosure and comprised of a conductive core and a layer formed on the conductive core, said layer made of a mixture of nickel hydroxide powder and cobalt monoxide powder covered with a layer of high-valence cobalt oxide; a hydrogen absorbing alloy negative electrode accommodated in said enclosure and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and conductive material powder and having a capacity 1.0 to 2.5 times the sum of the capacity of the nickel hydroxide contained in said positive electrode and the electricity required to oxidize the cobalt monoxide powder; a separator made of synthetic resin unwoven fabric having a texture size of 50 to 100 g/m 2 and a thickness of 0.1 to 0.25 mm, and located between said positive electrode and said negative electrode; and alkali electrolyte contained in said enclosure.
Claim 9
Dependent Claim
55 words
A secondary cell according to claim 5, wherein a current of 0.05 to 1 CmA is supplied to charge the cell initially, for a period during which an amount of electricity is applied which is 1.5 times or more the electricity required to oxidize the cobalt monoxide contained in said positive electrode into cobalt oxy-hydroxide.
Claim 10
Dependent Claim
146 words
A nickel-metal hydride secondary cell comprising: a non-sinter type nickel positive electrode accommodated in an enclosure and comprised of a conductive core and a layer formed on the conductive core, said layer made of a mixture of nickel hydroxide powder and cobalt monoxide powder covered with a layer of high-valence cobalt oxide; a hydrogen absorbing alloy negative electrode accommodated in said enclosure and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and conductive material powder, and having a capacity 1.0 to 2.5 times the sum of the capacity of the nickel hydroxide contained in said positive electrode and the electricity required to oxidize the cobalt monoxide powder; a separator made of synthetic resin unwoven fabric and located between said positive electrode and said negative electrode; and alkali electrolyte contained in said enclosure.
Claim 11
Dependent Claim
146 words
A nickel-metal hydride secondary cell comprising: a non-sinter type nickel positive electrode accommodated in an enclosure and comprised of a conductive core and a layer formed on the conductive core, said layer made of a mixture of nickel hydroxide powder and cobalt monoxide powder covered with a layer of high-valence cobalt oxide; a hydrogen absorbing alloy negative electrode accommodated in said enclosure and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and conductive material powder, and having a capacity 1.0 to 2.5 times the sum of the capacity of the nickel hydroxide contained in said positive electrode and the electricity required to oxidize the cobalt monoxide powder; a separator made of synthetic resin unwoven fabric and located between said positive electrode and said negative electrode; and alkali electrolyte contained in said enclosure.
Claim 12
Dependent Claim
55 words
A secondary cell according to claim 7, wherein a current of 0.05 to 1 CmA is supplied to charge the cell initially, for a period during which an amount of electricity is applied which is 1.5 times or more the electricity required to oxidize the cobalt monoxide contained in said positive electrode into cobalt oxy-hydroxide.
Claim 13
Dependent Claim
114 words
A nickel-metal hydride secondary cell comprising: a non-sinter type nickel positive electrode accommodated in an enclosure and comprised of a conductive core and a layer formed on the conductive core, said layer made of a mixture of nickel hydroxide powder and cobalt monoxide powder covered with a layer of high-valence cobalt oxide; a hydrogen absorbing alloy negative electrode accommodated in said enclosure and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and conductive material powder; a separator made of synthetic resin unwoven fabric and located between said positive electrode and said negative electrode: and alkali electrolyte contained in said enclosure.
Claim 14
Dependent Claim
114 words
A nickel-metal hydride secondary cell comprising: a non-sinter type nickel positive electrode accommodated in an enclosure and comprised of a conductive core and a layer formed on the conductive core, said layer made of a mixture of nickel hydroxide powder and cobalt monoxide powder covered with a layer of high-valence cobalt oxide; a hydrogen absorbing alloy negative electrode accommodated in said enclosure and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and conductive material powder; a separator made of synthetic resin unwoven fabric and located between said positive electrode and said negative electrode: and alkali electrolyte contained in said enclosure.
Claim 15
Dependent Claim
55 words
A secondary cell according to claim 9, wherein a current of 0.05 to 1 CmA is supplied to charge the cell initially, for a period during which an amount of electricity is applied which is 1.5 times or more the electricity required to oxidize the cobalt monoxide contained in said positive electrode into cobalt oxy-hydroxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |