Battery terminals, method for manufacturing battery terminals, battery, and method for manufacturing a battery

Abstract

In the present invention, a negative electrode terminal (electronic terminal) (10) includes a brim section (12) in which the following are diffusion bonded in the lamination direction: an Al layer (41) formed from an Al alloy in which the content of Al is greatest and the content of Mn or Mg is second greatest, and which has a conductivity of 30% IACS or greater; and a Cu layer (42) formed from Cu. The negative electrode terminal also includes: a shaft section (11) extending from the brim section in the lamination direction of the Al layer and the Cu layer; and a recess (13) that is positioned on the end of the shaft section on the Cu layer side and that includes a surface formed from the Cu layer.

Claims

1. A flange portion is formed by diffusion bonding in the stacking direction between an Al layer, which is made of an Al alloy having an electrical conductivity of 30% IACS or higher, and a Cu layer, which is made of Cu, with the Al layer having the highest content and the second highest content, Mn or Mg; a shaft portion extends from the flange portion in the stacking direction between the Al layer and the Cu layer; and a recess is located at the end of the shaft portion on the Cu layer side and has a surface made of the Cu layer. The Vickers hardness of the Al layer is 66 HV or higher. A battery terminal having a Vickers hardness of 120 HV or more in the Cu layer.

2. The battery terminal according to claim 1, wherein the Al alloy has an electrical conductivity of 40% IACS or higher.

3. The battery terminal according to claim 1 or 2, wherein the Al alloy contains Al, which is the most abundant element, and Mn, which is the second most abundant element.

4. A step of preparing a clad material by diffusion bonding in the stacking direction an Al layer, composed of an Al alloy having an electrical conductivity of 30% IACS or higher, and a Cu layer, composed of Cu, with Al, which has the highest content, and Mn or Mg, which has the second highest content. The process of tempering the clad material into a press blank, which is a material for press working, in which the Al layer having a Vickers hardness of 30 HV or more and the Cu layer having a Vickers hardness of 50 HV or more and 80 HV or less are diffusion-bonded in the lamination direction, A method for manufacturing a battery terminal, comprising the step of press-forming the press blank such that a flange portion, a shaft portion extending from the flange portion in the lamination direction of the Al layer and the Cu layer, and a recess located at the end of the shaft portion on the Cu layer side and having a surface made of the Cu layer are formed thereon, the Vickers hardness of the Al layer is 66 HV or more, and the Vickers hardness of the Cu layer is 120 HV or more.

5. The method for manufacturing a battery terminal according to claim 4, wherein the step of tempering the press blank involves tempering the Vickers hardness of the Al layer to 30 HV or more and 75 HV or less, and tempering the Vickers hardness of the Cu layer to 50 HV or more and 80 HV or less.

6. The method for manufacturing a battery terminal according to claim 4 or 5, wherein the step of preparing the cladding material is to prepare the cladding material by diffusion bonding in the lamination direction the Al layer, which is made of the Al alloy having an electrical conductivity of 40% IACS or more, and the Cu layer, which is made of Cu.

7. A battery terminal comprising: a flange portion formed by diffusion bonding in the stacking direction between an Al alloy having an conductivity of 30% IACS or higher and containing the most abundant Al and the second most abundant Mn or Mg, and having an Al layer with a Vickers hardness of 66 HV or higher and a Cu layer made of Cu with a Vickers hardness of 120 HV or higher; a shaft portion extending from the flange portion in the stacking direction between the Al layer and the Cu layer; and a recess located at the end of the shaft portion on the Cu layer side and having a surface made of the Cu layer; an electrolyte; a housing for storing the electrolyte; a positive electrode component for forming the positive electrode side of the battery; a negative electrode component for forming the negative electrode side of the battery; and a separator for separating the positive and negative electrodes of the battery. A battery in which the recess of the battery terminal is crimped and fixed to the negative electrode component.

8. A method for manufacturing a battery, comprising: a flange portion formed by diffusion bonding in the stacking direction of an Al alloy having an conductivity of 30% IACS or higher and composed of the most abundant Al and the second most abundant Mn or Mg, and having an Al layer having a Vickers hardness of 66 HV or higher; a Cu layer made of Cu having a Vickers hardness of 120 HV or higher; a shaft portion extending from the flange portion in the stacking direction of the Al layer and the Cu layer; a recess located at the end of the shaft portion on the Cu layer side and having a surface made of the Cu layer; an electrolyte; a housing for storing the electrolyte; a positive electrode component for forming the positive electrode side of the battery; a negative electrode component for forming the negative electrode side of the battery; and a separator for separating the positive and negative electrodes of the battery, A method for manufacturing a battery, comprising the step of crimping and fixing the recess of the battery terminal to the negative electrode component.

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