Device for controlling alkali storage battery
US-2016315357-A1 · Oct 27, 2016 · US
Negative electrode active material, negative electrode, alkaline storage battery, and method of producing negative electrode active material
US11916230B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11916230-B2 |
| Application number | US-201916688241-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 19, 2019 |
| Priority date | Dec 6, 2018 |
| Publication date | Feb 27, 2024 |
| Grant date | Feb 27, 2024 |
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Abstract
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A negative electrode active material includes a hydrogen storage alloy. The hydrogen storage alloy has an A2B7 crystal structure. The hydrogen storage alloy includes nickel. The saturation magnetization per unit mass is 1.9 emu·g−1 or more.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of producing an alkaline storage battery, comprising: preparing a hydrogen storage alloy; producing a negative electrode active material by heating the hydrogen storage alloy in an NaOH aqueous solution having a concentration of 44 mass % at a temperature of 105° C. or higher and 110° C. or less for an hour, and preparing a negative electrode with the negative electrode active material, wherein the hydrogen storage alloy has a chemical composition represented by the following Formula (II): A 2 B 7 (II) where A includes La and Mg; and B includes Ni, wherein the hydrogen storage alloy includes cobalt and 55 mass % or more and 65 mass % or less of nickel, wherein a saturation magnetization per unit mass of the negative electrode active material is 5.3 emu·g −1 to 5.8 emu·g −1 , and wherein a direct current internal resistance of the alkaline storage battery is less than 40 with respect to a direct current internal resistance of a second alkaline storage battery including a negative electrode active material having a saturation magnetization per unit mass is 0.1 emu g −1 when a state of charge (SOC) of the first and second alkaline storage batteries is 50%. 2. An alkaline storage battery comprising a negative electrode comprising a negative electrode active material, the negative electrode active material, comprising: a hydrogen storage alloy, wherein the hydrogen storage alloy has a chemical composition represented by the following Formula (II): A 2 B 7 (II) where A includes La and Mg; and B includes Ni, wherein the hydrogen storage alloy includes cobalt and 55 mass % or more and 65 mass % or less of nickel, and wherein a saturation magnetization per unit mass of the negative electrode active material is 5.3 emu·g −1 to 5.8 emu·g −1 , wherein a direct current internal resistance of the alkaline storage battery is less than 40 with respect to a direct current internal resistance of a second alkaline storage battery including a negative electrode active material having a saturation magnetization per unit mass is 0.1 emu g −1 when a state of charge (SOC) of the first and second alkaline storage batteries is 50%.
Assignees
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Classifications
- H01M4/383Primary
Hydrogen absorbing alloys · CPC title
based on nickel · CPC title
Alkaline accumulators · CPC title
Magnetic · CPC title
Negative electrodes · CPC title
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Frequently asked questions
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- What does patent US11916230B2 cover?
- A negative electrode active material includes a hydrogen storage alloy. The hydrogen storage alloy has an A2B7 crystal structure. The hydrogen storage alloy includes nickel. The saturation magnetization per unit mass is 1.9 emu·g−1 or more.
- Who is the assignee on this patent?
- Toyota Motor Co Ltd, Toyota Jidoshokki Kk
- What technology area does this patent fall under?
- Primary CPC classification H01M4/383. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 27 2024 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).