Energy storage device including spiral electrode group with reinforced separator
US-9608247-B2 · Mar 28, 2017 · US
Nickel hydride secondary battery
US9343742B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9343742-B2 |
| Application number | US-201314066414-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 29, 2013 |
| Priority date | Oct 30, 2012 |
| Publication date | May 17, 2016 |
| Grant date | May 17, 2016 |
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Abstract
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A nickel hydride secondary battery houses an electrode group including a positive electrode and a negative electrode which are overlapped with each other via a separator with an alkaline electrolyte solution, the negative electrode includes a hydrogen absorbing alloy, a negative-electrode additive agent, a thickening agent, and a conductive material, and the negative-electrode additive agent includes at least one selected from calcium fluoride, calcium sulfide, and calcium chloride.
First claim
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What is claimed is: 1. A nickel hydride secondary battery comprising: a container; and an electrode group housed in the container with an alkaline electrolyte solution in an air-tightly closed state, wherein the electrode group comprises a positive electrode and a negative electrode which are overlapped with each other via a separator, the negative electrode comprises a hydrogen absorbing alloy, a negative-electrode additive agent, a thickening agent, and a conductive material, and the negative-electrode additive agent comprises at least one selected from calcium fluoride, calcium sulfide, and calcium chloride. 2. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the negative-electrode additive agent is 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy. 3. The nickel hydride secondary battery according to claim 1 , wherein the thickening agent comprises at least one selected from carboxymethylcellulose, sodium polyacrylate, and hydroxypropylcellulose. 4. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the negative-electrode additive agent is 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, and the thickening agent comprises at least one selected from carboxymethylcellulose, sodium polyacrylate, and hydroxypropylcellulose. 5. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the thickening agent is 0.01 to 0.1 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy. 6. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the negative-electrode additive agent is 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, and an additive amount of the thickening agent is 0.01 to 0.1 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy. 7. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the negative-electrode additive agent is 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, the thickening agent comprises at least one selected from carboxymethylcellulose, sodium polyacrylate, and hydroxypropylcellulose, and an additive amount of the thickening agent is 0.01 to 0.1 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy. 8. The nickel hydride secondary battery according to claim 1 , wherein the hydrogen absorbing alloy has a composition represented by a general formula: Ln 1-w Mg w Ni x-y-z Al y T z , wherein Ln represents at least one element selected from a lanthanoid element, Ca, Sr, Sc, Y, Yb, Er, Ti, Zr, and Hf, T represents at least one element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si, P, and B, and w, x, y, and z represent 0<w<0.3, 3.00≦x≦3.80, 0.10≦y≦0.25, and 0≦z≦0.1, respectively. 9. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the negative-electrode additive agent is 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, and the hydrogen absorbing alloy has a composition represented by a general formula: Ln 1-w Mg w Ni x-y-z Al y T z , wherein Ln represents at least one element selected from a lanthanoid element, Ca, Sr, Sc, Y, Yb, Er, Ti, Zr, and Hf, T represents at least one element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si, P, and B, and w, x, y, and z represent 0<w<0.3, 3.00≦x≦3.80, 0.10≦y≦0.25, and 0≦z≦0.1, respectively. 10. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the negative-electrode additive agent is 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, the thickening agent comprises at least one selected from carboxymethylcellulose, sodium polyacrylate, and hydroxypropylcellulose, and the hydrogen absorbing alloy has a composition represented by a general formula: Ln 1-w Mg w Ni x-y-z Al y T z , wherein Ln represents at least one element selected from a lanthanoid element, Ca, Sr, Sc, Y, Yb, Er, Ti, Zr, and Hf, T represents at least one element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si, P, and B, and w, x, y, and z represent 0<w<0.3, 3.00≦x≦3.80, 0.10≦y≦0.25, and 0≦z≦0.1, respectively. 11. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the negative-electrode additive agent is 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, the thickening agent comprises at least one selected from carboxymethylcellulose, sodium polyacrylate, and hydroxypropylcellulose, an additive amount of the thickening agent is 0.01 to 0.1 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, and the hydrogen absorbing alloy has a composition represented by a general formula: Ln 1-w Mg w Ni x-y-z Al y T z , wherein Ln represents at least one element selected from a lanthanoid element, Ca, Sr, Sc, Y, Yb, Er, Ti, Zr, and Hf, T represents at least one element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si, P, and B, and w, x, y, and z represent 0<w<0.3, 3.00≦x≦3.80, 0.10≦y≦0.25, and 0≦z≦0.1, respectively. 12. The nickel hydride secondary battery according to claim 1 , wherein the conductive material comprises carbon black. 13. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the negative-electrode additive agent is 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, and the conductive material comprises carbon black. 14. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the negative-electrode additive agent is 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, the thickening agent comprises at least one selected from carboxymethylcellulose, sodium polyacrylate, and hydroxypropylcellulose, and the conductive material comprises carbon black. 15. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the negative-electrode additive agent is 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, the thickening agent comprises at least one selected from carboxymethylcellulose, sodium polyacrylate, and hydroxypropylcellulose, an additive amount of the thickening agent is 0.01 to 0.1 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, and the conductive material comprises carbon black. 16. The nickel hydride secondary battery according to claim 1 , wherein an additive amount of the negative-electrode additive agent is 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, the thickening agent comprises at least one selected from carboxymethylcellulose, sodium polyacrylate, and hydroxypropylcellulose, an additive amount of the thickening agent is 0.01 to 0.1 parts by mass with respect to 100 parts by mass of the hydrogen absorbing alloy, the hydrogen absorbing alloy has a composition represented by a general formula: Ln 1-w Mg w Ni x-y-z Al y T z , wherein Ln represents at least one element selected from a lanthanoid element, Ca, Sr, Sc, Y, Yb, Er, Ti, Zr, and Hf, T represents at least one element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Ga, Zn, Sn, In, Cu, Si,
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- What does patent US9343742B2 cover?
- A nickel hydride secondary battery houses an electrode group including a positive electrode and a negative electrode which are overlapped with each other via a separator with an alkaline electrolyte solution, the negative electrode includes a hydrogen absorbing alloy, a negative-electrode additive agent, a thickening agent, and a conductive material, and the negative-electrode additive agent in…
- Who is the assignee on this patent?
- Fdk Twicell Co Ltd, Fdk Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M4/242. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 17 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).