JP2005093306A - Flexible connection terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible connection terminal usable in a high-temperature environment which exceeds 800°C, at low manufacturing cost. <P>SOLUTION: The flexible connecting terminal has a plurality of rectangular-shaped Ni plates, laminated and integrated near terminal holes formed at both end parts. It is preferable that the side faces near the terminal holes be integrally jointed and integrated. Ni purity of the respective Ni plates is to be ≥95%, a Vickers hardness is to be ≥Hv 30 and ≤Hv 140, and the thickness is to be ≥0.1 mm and ≤0.35 mm. The terminal is preferably formed bent in the longitudinal direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a flexible connection terminal that can be used in a high temperature environment.

Conventionally, copper is mainly used as a flexible connection terminal, and a flexible connection terminal in which a copper plate is bent and formed in a longitudinal direction and laminated to form terminals at both ends, or a knitted wire is used instead of a copper plate. Flexible connection terminals and the like are known.
These flexible connection terminals have a high degree of freedom in electrical connection and are used in various applications.

Recently, focusing on heat resistance, a flexible connecting terminal using a Ni wire knitted wire or an aggregate stranded wire as a conductor portion and fixing the end with a terminal portion made of SUS material is disclosed in Japanese Patent Application Laid-Open No. 2002-222585 (Patent Document). Proposed by 1). This technique can improve heat resistance and corrosion resistance without the need for plating. And it is said that it can be used for wiring in an engine room of an automobile, wiring for an electric furnace, wiring for a transformer, and the like.
Japanese Patent Laid-Open No. 2002-222585

The technique of applying Ni to the above-described knitted wire or aggregate stranded wire is advantageous in that it has a low melting point and is suitable for use in a high-temperature environment as compared with copper that is significantly softened at high temperatures.
However, there is also a problem that a separate member called a SUS (stainless steel) terminal is necessary for the knitted wire or the assembled stranded wire. Moreover, SUS is high in electrical resistance and is not suitable for applications where energy loss should be reduced as much as possible.
Moreover, since a conductor part consists of a braided wire or aggregate strand of a Ni wire, high manufacturing cost is inevitable.
An object of the present invention is to solve the increase in electrical resistance due to the use of a SUS material, and to provide a flexible connection terminal that can be used even in a high temperature environment exceeding 800 ° C. at a low manufacturing cost.

  The present inventor has found that heat resistance can be ensured and resistance can be reduced by adopting a configuration in which strip-shaped Ni plates are laminated without using a SUS terminal, and has reached the present invention.

That is, the present invention is a flexible connection terminal in which a plurality of strip-shaped Ni plates are laminated and integrated in the vicinity of terminal holes formed at both ends.
Preferably, it is a flexible connection terminal in which the side surface in the vicinity of the terminal hole is welded and integrated.
The Ni purity of the strip-shaped Ni plate of the present invention is preferably 95% or more, the hardness is in the range of Hv80 to Hv140 in terms of Vickers hardness, and the thickness of the strip-shaped Ni plate is preferably 0.1 mm to 0.35 mm.
Moreover, in this invention, it is preferable that it is not a simple flat form, but is curved-shaped in the longitudinal direction.

  According to the present invention, the manufacturing cost of a flexible connection terminal that can be used in a high-temperature environment can be drastically reduced. For example, in order to supply energy using exhaust heat generated simultaneously with power generation, This is an indispensable technology for the practical application of solid oxide fuel cells whose operating ambient temperature reaches around 1000 ° C.

The present invention can obtain the effect of flexibility such as bending or twisting by laminating a plurality of strip-shaped Ni plates, and by laminating in the vicinity of the terminal holes formed at both ends, the laminated parts do not separate. The effect is obtained. And, by using a Ni plate having a melting temperature of 1400 ° C. or more, it does not melt even in a high temperature environment around 1000 ° C., and its electrical resistance is significantly lower than other general metals, so energy loss is reduced. The characteristic of being minimized is obtained.
Various methods such as caulking, diffusion bonding, electrical resistance welding, laser welding, and electron beam welding can be used as a method for integration in the vicinity of the terminal hole, but from the viewpoint of low manufacturing cost and wide flexibility. It is preferable that the side surfaces in the vicinity of the terminal holes are welded and integrated at the same time as they are laminated and molded.

In addition, as for the strip-shaped Ni plate applied to the present invention, those having a Ni purity of less than 95% can be used, but from the viewpoint of preventing thinning and hardening of the material due to oxidation of impurities in a high temperature environment. Is preferably 95% or more.
Further, the hardness is not particularly limited, and those exceeding Hv140 can be used, but those having a Vickers hardness of less than Hv140 from the viewpoint of easy plastic working during curve forming and giving the finished product flexibility. Is preferred. Further, the lower limit of the hardness is not particularly limited, but Hv30 or more is preferable in order to avoid generation of scratches and burrs in the processing step. Furthermore, from the marketability of the material, it is preferably within the range of Hv80 to Hv140.
The thickness of the strip-shaped Ni plate is not particularly limited, but is preferably 0.1 mm to 0.35 mm for reasons of flexibility such that bending and twisting can be easily performed by human power.
Moreover, in this invention, it is more preferable not to be a simple flat plate shape but to be curved and formed in the longitudinal direction because a degree of freedom in the longitudinal direction is born. A shape such as a U-shape can be applied as the curved shape.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of one embodiment of the finished product of the present invention. 1. Is the conductor part; Is a terminal mounting hole; Is a welded joint. The conductor portion 1 is made of an annealed material having a Ni purity of 99.9%, so that about 10 strip Ni plates having a hardness of Hv80, a thickness of 0.3 mm, and a width of 30 mm are laminated. Further, as shown in the figure, the terminal hole of the connection terminal has a degree of freedom in which the terminal hole of the connection terminal can be adjusted in accordance with the positional relationship of the two terminals on the attachment counterpart side by bending in the longitudinal direction with a radius of 15 mm. The attachment holes 2 were laminated and molded into a curved shape, and the joint portions 3 were formed by welding by TIG welding in the thickness direction on both side surfaces in the vicinity of the terminal holes, and then formed by press punching.

FIG. 2 is an example of the connection terminal of the present invention having no curved shape. If the two terminals on the attachment side are equal to or shorter than the length of the terminal hole of the connection terminal, it is not always necessary to have the longitudinal curved shape as shown in FIG.
FIG. 3 shows an example of a connection terminal according to the present invention which is effective when two terminals on the attachment counterpart face each other, and is a horseshoe type. This shape can easily secure the degree of freedom with respect to the distance between the opposing terminals.

  The present invention can also be applied to, for example, a flexible connection terminal for a solid oxide fuel cell in which the ambient temperature during operation reaches around 1000 ° C.

It is a perspective view which shows an example of this invention. It is a perspective view which shows the other example of this invention. It is a perspective view which shows the other example of this invention.

Explanation of symbols

  1. 1. conductor part 2. Terminal mounting hole, Welded joint

Claims (6)

A flexible connection terminal in which a plurality of strip-shaped Ni plates are laminated and integrated in the vicinity of terminal holes formed at both ends. 2. The flexible connection terminal according to claim 1, wherein side surfaces in the vicinity of the terminal holes are welded and integrated. The flexible connecting terminal according to claim 1, wherein the Ni purity of the strip-shaped Ni plate is 95% or more. The flexible connecting terminal according to any one of claims 1 to 3, wherein the strip-shaped Ni plate has a Vickers hardness of Hv30 to Hv140. The flexible connection terminal according to any one of claims 1 to 4, wherein the strip-shaped Ni plate has a thickness of 0.1 mm to 0.35 mm. 6. The flexible connection terminal according to claim 1, wherein the flexible connection terminal is curved in the longitudinal direction.

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