Device for measuring a current flowing in a cable

• US 8,142,237 B2
• Filed: 04/14/2009
• Issued: 03/27/2012
• Est. Priority Date: 12/20/2004
• Status: Active Grant

• Current Assignee: CPS Technology Holdings, LLC, Kromberg & Schubert GmbH & Co. KG
• Original Assignee: Johnson Controls Technology Company (Johnson Controls International plc), Kromberg & Schubert GmbH & Co. KG
• Inventors: Condamin, Bruno, Muis, Pascal, Bages, Ghislain
• Primary Examiner(s): Abrams, Neil
• Application Number:
  US12/423,470
• Publication Number:
  US 20100066351A1
• Time in Patent Office: 1,078 Days
• Field of Search: 439761-763, 439/913, 439/754, 439/957, 320/105, 324/713, 324/117.R, 324/117.H, 340/636.13
• US Class Current: 439/762
• CPC Class Codes: G01R 1/203 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 Class Codes: G01R 19/0092 measuring current only all subgroups of G01R19/00 take precedence
• CPC Class Codes: G01R 31/364 Battery terminal connectors with integrated measuring arrangements
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: H01R 11/287 Intermediate parts between battery post and cable end piece
• CPC Class Codes: Y10S 439/913 Condition determining device, e.g. oxygen sensor, accelerometer, ionizer chamber, thermocouple
• CPC Class Codes: Y10S 439/957 Auxiliary contact part for circuit adaptation
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

An exemplary embodiment relates to a measuring device for measuring a current flowing in a first cable. The measuring device includes a measuring shunt in the form of a plate connected in series with the first cable and associated with a measuring electronic card connected to a data transmission cable. The measuring shunt further includes a measuring portion of resistive alloy coupled to connection portions on either side of the measuring portion. The connection portions are integrally formed with the measuring portion, and the first cable is secured to at least one of the connection portions of the measuring shunt.

Claims

1. A method of making a measuring device for measuring a current flowing in a cable connected to a battery, the method comprising:

forming a measuring shunt from a resistive alloy, the measuring shunt comprising holes defining a measuring portion disposed between a first connection portion and a second connection portion;

coupling a conductive core of the cable to the first connection portion by autogenous welding;

coupling the second connection portion by autogenous welding to a conductive tab integral with a battery cable terminal, wherein the conductive tab extends perpendicular to an axis of the battery cable terminal and includes a total thickness less than the thickness of the battery cable terminal; and

coupling a measuring electronic circuit to the measuring shunt by engaging connection pins of the electronic control circuit into the holes of the measuring shunt, the measuring electronic circuit being coupled to a data transmission cable.

2. The method of claim 1, further comprising the step of coating the measuring shunt with a resin.

3. The method of claim 1, wherein the measuring shunt is in the form of a plate and made of a single piece of resistive alloy.

4. The method of claim 2, wherein the resin is molded around the measuring device, a portion of the cable, and a portion of the conductive material coupled to the second connection portion to strengthen a mechanical connection between the cable, the measuring shunt, and the conductive material.