Battery terminal, method for manufacturing battery terminal, and battery

Patent metadata

Field	Value
Publication number	US-9525228-B2
Application number	US-201414482516-A
Country	US
Kind code	B2
Filing date	Sep 10, 2014
Priority date	Sep 25, 2013
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

A battery terminal includes an overlay clad plate material including at least a first metal layer made of Al or Al alloy and a second metal layer made of Cu or Cu alloy, formed by bonding at least the first metal layer and the second metal layer to each other in the thickness direction. Either the first metal layer or the second metal layer of the clad plate material is partially removed to form an exposure surface on which either the second metal layer or the first metal layer is exposed in the clad plate material.

First claim

What is claimed is:

1. A battery terminal comprising an overlay clad plate material including at least a first metal layer made of Al or Al alloy and a second metal layer made of Cu or Cu alloy, formed by bonding at least the first metal layer and the second metal layer to each other in a thickness direction,
wherein either the first metal layer or the second metal layer of the overlay clad plate material is partially removed to form an exposure surface on which either the second metal layer or the first metal layer is exposed,
wherein either the first metal layer or the second metal layer includes a first bonding surface bonded to a connecting member configured to connect a battery to an external portion,
either the second metal layer or the first metal layer includes a second bonding surface bonded to a current collector configured to connect with an electrode of the battery,
the first bonding surface is formed in a region excluding the exposure surface of a first surface on a side formed with the exposure surface, and
the second bonding surface is formed in a region corresponding to the exposure surface.

2. The battery terminal according to claim 1 , wherein
the second bonding surface is formed on a second surface opposite to the exposure surface.

3. The battery terminal according to claim 1 , wherein
a through-hole is formed in the exposure surface, and
the second bonding surface is formed on an inner peripheral surface of the through-hole.

4. The battery terminal according to claim 1 , wherein
either the first metal layer or the second metal layer including the first bonding surface is made of a same type of metal material as that of the connecting member, and
either the second metal layer or the first metal layer including the second bonding surface is made of a same type of metal material as that of the current collector.

5. The battery terminal according to claim 1 , wherein
the exposure surface is formed in a concave shape concave toward a second surface opposite to the exposure surface beyond an interface between the first metal layer and the second metal layer.

6. The battery terminal according to claim 1 , wherein
the clad plate material includes a protrusion portion protruding toward a first surface on a side formed with the exposure surface, and
the exposure surface is formed on at least a part of the first surface toward which the protrusion portion protrudes.

7. The battery terminal according to claim 6 , wherein
a length of the protrusion portion in the thickness direction is larger than a length of a portion other than the protrusion portion in the thickness direction.

8. The battery terminal according to claim 1 , wherein
the clad plate material further includes a reaction suppressing layer made of Ni or Ni alloy on an interface between the first metal layer and the second metal layer.

9. The battery terminal according to claim 1 , wherein
the overlay clad plate material further includes a third metal layer bonded to either the second metal layer or the first metal layer to hold either the second metal layer or the first metal layer between the third metal layer and either the first metal layer or the second metal layer, and
the third metal layer in a region corresponding to the exposure surface is partially removed to form a reverse side exposure surface on which either the second metal layer or the first metal layer is exposed.

10. The battery terminal according to claim 9 , wherein
either the first metal layer or the second metal layer includes a first bonding surface bonded to a connecting member configured to connect a battery to an external portion, and
a thickness of either the first metal layer or the second metal layer including the first bonding surface is larger than a thickness of the third metal layer.

11. A battery terminal comprising an overlay clad plate material including at least a first metal layer made of Al or Al alloy and a second metal layer made of Cu or Cu alloy, formed by bonding at least the first metal layer and the second metal layer to each other in a thickness direction,
wherein either the first metal layer or the second metal layer of the overlay clad plate material is partially removed to form an exposure surface on which either the second metal layer or the first metal layer is exposed,
wherein the overlay clad plate material further includes a third metal layer bonded to either the second metal layer or the first metal layer to hold either the second metal layer or the first metal layer between the third metal layer and either the first metal layer or the second metal layer,
the third metal layer in a region corresponding to the exposure surface is partially removed to form a reverse side exposure surface on which either the second metal layer or the first metal layer is exposed, and
wherein the third metal layer is made of a same type of metal material as that of either the first metal layer or the second metal layer.

12. A battery terminal comprising an overlay clad plate material including at least a first metal layer made of Al or Al alloy and a second metal layer made of Cu or Cu alloy, formed by bonding at least the first metal layer and the second metal layer to each other in a thickness direction,
wherein either the first metal layer or the second metal layer of the overlay clad plate material is partially removed to form an exposure surface on which either the second metal layer or the first metal layer is exposed,
wherein the overlay clad plate material further includes a third metal layer bonded to either the second metal layer or the first metal layer to hold either the second metal layer or the first metal layer between the third metal layer and either the first metal layer or the second metal layer,
wherein the third metal layer in a region corresponding to the exposure surface is partially removed to form a reverse side exposure surface on which either the second metal layer or the first metal layer is exposed, and
wherein the overlay clad plate material further includes a reaction suppressing layer made of Ni or Ni alloy on at least one of an interface between the first metal layer and the second metal layer and an interface between the second metal layer and the third metal layer.

13. A battery comprising a battery terminal including an overlay clad plate material including at least a first metal layer made of Al or Al alloy and a second metal layer made of Cu or Cu alloy, formed by bonding at least the first metal layer and the second metal layer to each other in a thickness direction, wherein
in the battery terminal, either the first metal layer or the second metal layer of the overlay clad plate material is partially removed to form an exposure surface on which either the second metal layer or the first metal layer is exposed,
either the first metal layer or the second metal layer of the battery terminal includes a first bonding surface bonded to a connecting member configured to connect with an external portion,
either the second metal layer or the first metal layer of the battery terminal includes a second bonding surface bonded to the current collector,
the first bonding surface is formed in a region excluding the exposure surface of a first surface on a side formed with the exposure surface, and
the second bonding surface is formed in a region corresponding to the exposure surface.

14. The battery according to claim 13 , further comprising:
an electrode; and
a current collector configured to connect with the electrode.

15. The battery according to claim 14 , wherein
either the first metal la

Assignees

• Neomax Mat Co Ltd
• Hitachi Metals Ltd

Inventors

• Oda Yoshimitsu
• Yamamoto Masaharu
• Ishio Masaaki

Classifications

• H01R13/03 Primary

  characterised by the material, e.g. plating, or coating materials · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01R43/16

  for manufacturing contact members, e.g. by punching and by bending · CPC title

• Y10T29/49115

  including coating or impregnating · CPC title

• H01M50/566

  by welding, soldering or brazing · CPC title