CLAD MATERIAL FOR BATTERY NEGATIVE ELECTRODE LEAD MATERIAL, METHOD OF MANUFACTURING CLAD MATERIAL FOR BATTERY NEGATIVE ELECTRODE LEAD MATERIAL AND BATTERY
First Claim
1. A clad material for a battery negative electrode lead material, constituted of a clad material of a three-layer structure prepared by stacking a first layer constituted of pure Ni containing at least 99.0 mass % of Ni, a second layer constituted of pure Cu containing at least 99.75 mass % of Cu and a third layer constituted of pure Ni containing at least 99.0 mass % of Ni in this order, whereinthe thickness of a first diffusion layer formed between the first layer and the second layer and the thickness of a second diffusion layer formed between the second layer and the third layer are at least 0.5 μ
- m and not more than 3.5 μ
m.
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Accused Products
Abstract
This clad material for a battery negative electrode lead material is constituted of a clad material of a three-layer structure including a first layer constituted of pure Ni, a second layer constituted of pure Cu and a third layer constituted of pure Ni. The thickness of a first diffusion layer formed between the first layer and the second layer and the thickness of a second diffusion layer formed between the second layer and the third layer are at least 0.5 μm and not more than 3.5 μm.
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Citations
19 Claims
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1. A clad material for a battery negative electrode lead material, constituted of a clad material of a three-layer structure prepared by stacking a first layer constituted of pure Ni containing at least 99.0 mass % of Ni, a second layer constituted of pure Cu containing at least 99.75 mass % of Cu and a third layer constituted of pure Ni containing at least 99.0 mass % of Ni in this order, wherein
the thickness of a first diffusion layer formed between the first layer and the second layer and the thickness of a second diffusion layer formed between the second layer and the third layer are at least 0.5 μ - m and not more than 3.5 μ
m. - View Dependent Claims (2, 3, 4, 5)
- m and not more than 3.5 μ
-
6. A method of manufacturing a clad material for a battery negative electrode lead material, comprising the steps of:
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preparing a clad material by rolling a first layer constituted of pure Ni containing at least 99.0 mass % of Ni, a second layer constituted of pure Cu containing at least 99.75 mass % of Cu and a third layer constituted of pure Ni containing at least 99.0 mass % of Ni in a state stacked in this order thereby bonding the first layer, the second layer and the third layer to each other; and forming a first diffusion layer having a thickness of at least 0.5 μ
m and not more than 3.5 μ
m between the first layer and the second layer and a second diffusion layer having a thickness of at least 0.5 μ
m and not more than 3.5 μ
m between the second layer and the third layer by holding the clad material under a temperature condition of at least 650°
C. and not more than 850°
C. for at least 10 seconds and not more than 5 minutes and continuously heat-treating the clad material while transporting the clad material into a continuous furnace. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A battery comprising:
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a battery negative electrode lead material constituted of a clad material of a three-layer structure prepared by stacking a first layer constituted of pure Ni containing at least 99.0 mass % of Ni, a second layer constituted of pure Cu containing at least 99.75 mass % of Cu and a third layer constituted of pure Ni containing at least 99.0 mass % of Ni in this order; and a battery negative electrode, constituted of an Ni-plated steel plate or an Ni—
Fe alloy, to which the battery negative electrode lead material is resistance-welded in a state where the first layer or the third layer is in contact therewith, whereinthe thickness of a first diffusion layer formed between the first layer and the second layer and the thickness of a second diffusion layer formed between the second layer and the third layer are at least 0.5 μ
m and not more than 3.5 μ
m in the battery negative electrode lead material. - View Dependent Claims (17, 18, 19)
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Specification