Current detection device

Patent metadata

Field	Value
Publication number	US-12135342-B2
Application number	US-202218061337-A
Country	US
Kind code	B2
Filing date	Dec 2, 2022
Priority date	Jul 14, 2020
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

A current detection device includes a plurality of current detection units arranged in the current detection device. Each of the current detection units includes a bus bar that enables a current to be measured to flow therethrough, a magnetic sensor disposed at a position facing the bus bar, and a pair of shields disposed so as to sandwich the bus bar and the magnetic sensor in a facing direction in which the bus bar and the magnetic sensor face each other. The bus bars of the plurality of current detection units extend so as to be aligned to one another and, as viewed in the facing direction, the positions of the shield and the magnetic sensor of each of the current detection units in an extension direction of the bus bars differ from the positions of the shield and the magnetic sensor of the adjacent current detection unit.

First claim

What is claimed is:

1. A current detection device comprising:
a plurality of current detection units arranged in the current detection device, each of the current detection units including:
a bus bar extending in a first direction, configured to allow a current to be measured to flow therethrough;
a magnetic sensor facing the bus bar in a second direction; and
a pair of shields disposed at a position corresponding to the magnetic sensor and facing each other in the second direction, such that the bus bar and the magnetic sensor are interposed between the pair of shields,
wherein the plurality of current detection units are arranged in a third direction such that the bus bars of the plurality of current detection units are aligned to one another, and
wherein as viewed from the second direction, the position of the shield along the first direction in one of the plurality of current detection units is different from the position of the shield along the first direction in an adjacent current detection unit adjacent to the one current detection unit,
wherein, as viewed from the first direction, the pair of shields in the one current detection unit and that in the adjacent current detection unit partially overlap each other in the third direction,
and wherein, as viewed from the second direction, the pair of shields in each current detection unit has at least one cutout in an outer edge thereof, such that the cutout of the pair of shields in the one current detection unit fits another cutout of the pair of shields in the adjacent current detection unit in a plan view from the second direction, in a portion where the pair of shields partially overlap each other in the third direction.

2. The current detection device according to claim 1 , wherein the position of the pair of shields along the second direction in the one current detection unit is the same as that in the adjacent current detection unit, and a position of the magnetic sensor along the second direction in the one current detection unit is the same as that in the adjacent current detection unit.

Assignees

• Alps Alpine Co Ltd

Inventors

• Tamura Manabu
• Abe Minoru

Classifications

• G01R19/0092

  Measuring current only · CPC title

• G01R15/148

  involving the measuring of a magnetic field or electric field (G01R15/18, G01R15/20, G01R15/24, G01R15/26 take precedence) · CPC title

• G01R15/202

  using Hall-effect devices (Hall elements in arrangements for measuring electrical power G01R21/08) · CPC title

• G01R15/205

  using magneto-resistance devices, e.g. field plates · CPC title

• G01R15/207 Primary

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