Current sensing device and method for producing the same

Patent metadata

Field	Value
Publication number	US-10564188-B2
Application number	US-201615739022-A
Country	US
Kind code	B2
Filing date	Jun 14, 2016
Priority date	Jun 22, 2015
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

Provided is a current sensing device including an electrical conductor made of electrically conductive metal; and voltage sensing terminals provided on the electrical conductor. Each voltage sensing terminal is formed by inserting bar-like metal into a through-hole formed in the electrical conductor, and the voltage sensing terminal includes a first terminal portion that is stored in the through-hole and a second terminal portion that protrudes from the through-hole.

First claim

What is claimed is:

1. A current sensing device comprising:
a resistive element having first and second opposite end surfaces and designed to have a specific resistance between the first and second opposite end surfaces;
a pair of electrodes each having an electrical conductivity hi her than that of the resistive element, the pair of electrodes each having proximal and distal opposite end surfaces and electrically connected to the resistive element in such a manner that the proximal end surfaces of the pair of electrodes are in direct contact, respectively, with the first and second opposite end surfaces of the resistive element, wherein each of the pair of electrodes comprises a through-hole formed in the electrode adjacent to the proximal end surface; and
a pair of voltage sensing terminals formed of a rod-like metal and inserted, respectively, in the through-holes of the electrodes to establish electrical connection with the pair of electrodes,
wherein each of the pair of voltage sensing terminals comprises two parallel flanges arranged along a length of the voltage sensing terminal, the two parallel flanges tightly pressing the electrodes from opposite upper and lower surfaces of the electrode to secure the voltage sensing terminal to the electrode, and
the voltage sensing terminal includes a first terminal portion located in the through-hole of the electrode between the two parallel flanges and a second terminal portion standing from the electrode.

2. The current sensing device according to claim 1 , wherein at least one of the opposite upper and lower surfaces of the electrode is formed with a recess inclusive of the through-hole, and one of the two parallel flanges sits in the recess.

3. The current sensing device according to claim 1 , wherein the current sensing device includes a section, between the pair of voltage sensing terminals, whose width is narrower than widths of any other sections of the current sensing device.

4. A method for producing a current sensing device, comprising:
providing a resistive element having first and second opposite end surfaces and designed to have a specific resistance between the first and second opposite end surfaces;
providing a pair of electrodes each having an electrical conductivity higher than that of the resistive element, the pair of electrodes each having proximal and distal opposite end surfaces and electrically connected to the resistive element in such a manner that the proximal end surfaces of the pair of electrodes are in direct contact, respectively, with the first and second opposite end surfaces of the resistive element;
machining the current sensing device to form a section of the current sensing device which includes the resistive element and whose width is narrower than widths of any other sections of the current sensing device;
forming a pair of through-holes, respectively, in the pair of electrodes adjacent to the proximal end surfaces; and
inserting a pair of voltage sensing terminals, respectively, in the pair of through-holes, each of the pair of voltage sensing terminals being formed with a rod-like metal and comprising two parallel flanges arranged along a length of the voltage sensing terminal, the two parallel flanges tightly pressing the electrodes from upper and lower opposite surfaces of the electrode to secure the voltage sensing terminal upright to the electrode.

Assignees

• Koa Corp

Inventors

• Kameko Kenji
• Arai Kosuke

Classifications

• H01C1/14

  Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors · CPC title

• H01C13/00 Primary

  Resistors not provided for elsewhere · CPC title

• G01R15/207

  Constructional details independent of the type of device used · CPC title

• G01R15/146

  Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop (if no voltage isolation is involved G01R1/203 or G01R19/0092) · CPC title

• G01R1/203

  Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts (resistors in general H01C; microwave or radiowave terminations H01P1/26; coupling devices H01R) · CPC title