Laminated electrode-type battery, manufacturing method therefor, vehicle, and device
First Claim
1. A laminated electrode-type battery comprising:
- a laminated electrode body including;
a positive electrode plate in which a positive electrode core member is formed, on a part of at least one surface, with a positive electrode mixture layer;
a negative electrode plate in which a negative electrode core member is formed, on a part of at least one surface, with a negative electrode mixture layer; and
separators interposed between the positive electrode plate and the negative electrode plate, the positive electrode plate, negative electrode plate, and separators being laminated so that a remaining part of the positive electrode core member and a remaining part of the negative electrode core member protrude in different directions from each other;
a positive current collector joined to an end portion of the positive electrode core member protruding from the positive electrode plate of the laminated electrode body; and
a negative current collector joined to an end portion of the negative electrode core member protruding from the negative electrode plate of the laminated electrode body,whereinthe laminated electrode-type battery is a lithium ion secondary battery,the laminated electrode-type battery comprises;
a positive electrode connecting material that connects the end portion of the positive electrode core member and a plate surface of the positive current collector; and
a negative electrode connecting material that connects the end portion of the negative electrode core member and a plate surface of the negative current collector,a melting point of the positive electrode connecting material is lower than a melting point of the positive electrode core member,a melting point of the negative electrode connecting material is lower than a melting point of the negative electrode core member,the positive electrode core member is made of aluminum,the negative electrode core member is made of copper,the positive electrode connecting material is made of a brazing material selected from Al—
Si-based brazing material, Al—
Si—
Mg-based brazing material, Al—
Zn-based brazing material, and Zn—
Sn-based brazing material, andthe negative electrode connecting material is made of a brazing material selected from Ni-based brazing material, Ag-based brazing material, and Cu-based brazing material.
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Accused Products
Abstract
Provided are a laminated electrode-type battery having high joint strength and mechanical strength around a connecting portion between a positive-electrode current collector and a positive-electrode core member and around a connecting portion between a negative-electrode current collector and a negative-electrode core member, a manufacturing method therefor, a vehicle, and a device. The leading end of a positive-electrode core member and a positive-electrode current collector are joined by a connecting material. The melting point of the connecting material for positive-electrode is lower than that of the positive-electrode core member. Meanwhile, the leading end of a negative-electrode core member and a negative-electrode current collector are joined by a connecting material. The melting point of the connecting material for negative-electrode is lower than that of the negative-electrode core member.
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Citations
14 Claims
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1. A laminated electrode-type battery comprising:
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a laminated electrode body including;
a positive electrode plate in which a positive electrode core member is formed, on a part of at least one surface, with a positive electrode mixture layer;
a negative electrode plate in which a negative electrode core member is formed, on a part of at least one surface, with a negative electrode mixture layer; and
separators interposed between the positive electrode plate and the negative electrode plate, the positive electrode plate, negative electrode plate, and separators being laminated so that a remaining part of the positive electrode core member and a remaining part of the negative electrode core member protrude in different directions from each other;a positive current collector joined to an end portion of the positive electrode core member protruding from the positive electrode plate of the laminated electrode body; and a negative current collector joined to an end portion of the negative electrode core member protruding from the negative electrode plate of the laminated electrode body, wherein the laminated electrode-type battery is a lithium ion secondary battery, the laminated electrode-type battery comprises; a positive electrode connecting material that connects the end portion of the positive electrode core member and a plate surface of the positive current collector; and a negative electrode connecting material that connects the end portion of the negative electrode core member and a plate surface of the negative current collector, a melting point of the positive electrode connecting material is lower than a melting point of the positive electrode core member, a melting point of the negative electrode connecting material is lower than a melting point of the negative electrode core member, the positive electrode core member is made of aluminum, the negative electrode core member is made of copper, the positive electrode connecting material is made of a brazing material selected from Al—
Si-based brazing material, Al—
Si—
Mg-based brazing material, Al—
Zn-based brazing material, and Zn—
Sn-based brazing material, andthe negative electrode connecting material is made of a brazing material selected from Ni-based brazing material, Ag-based brazing material, and Cu-based brazing material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11, 12)
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9. A method of manufacturing a laminated electrode-type battery, in which a laminated electrode body is produced by laminating a positive electrode plate in which a part of at least one surface of a positive electrode core member is formed with a positive electrode mixture layer, a negative electrode plate in which a part of at least one surface of a negative electrode core member is formed with a negative electrode mixture layer, and separators interposed between the positive electrode plate and the negative electrode plate, so that a remaining part of the positive electrode core member and a remaining part of the negative electrode core member protrude in different directions from each other;
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an end portion of the negative electrode core member protruding from the negative electrode plate of the laminated electrode body is joined to a plate surface of a negative current collector with a negative electrode connecting material, and an end portion of the positive electrode core member protruding from the positive electrode plate of the laminated electrode body is joined to a plate surface of a positive current collector with a positive electrode connecting material, wherein the laminated electrode-type battery is a lithium ion secondary battery, the positive electrode core member is made of aluminum, the negative electrode core member is made of copper, wherein a brazing material for positive electrode which has a lower melting point than a melting point of the positive electrode core member, the brazing material for positive electrode being one of Al—
Si-based brazing material, Al—
Si—
Mg-based brazing material, Al—
Zn-based brazing material, and Zn—
Sn-based brazing material is used as the positive electrode connecting material, anda brazing material for negative electrode which has a lower melting point than a melting point of the negative electrode core member, the brazing material for negative electrode being one of Ni-based brazing material, Ag-based brazing material, and Cu-based brazing material is used as the negative electrode connecting material. - View Dependent Claims (10, 13, 14)
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Specification