Integrally formed current sensor device

Abstract

A current sensor device for measuring a current, in particular for measuring a battery current in motor vehicles, including an electric resistance element on which the current can be determined by means of a voltage, and a first and a second connection element which are electrically connected to the resistance element and are arranged on different sides of the resistance element. The resistance element and the connection elements are integrally formed.

1 . A current sensor device for measuring a battery current in motor vehicles, comprising
 an electrical resistance element on which the current can be determined on a voltage, and   a first and second connection element which are each arranged on different sides of the resistance element and electrically connected to the resistance element,   wherein the resistance element and the connection elements are integrally formed.   
     
     
         2 . The current sensor device as claimed in  claim 1 , the resistance element and the connection elements are formed from a one-piece sheet metal element. 
     
     
         3 . The current sensor device as claimed in  claim 1 , wherein the resistance element has a cross section which is smaller than the cross section of the connection elements. 
     
     
         4 . The current sensor device as claimed in  claim 3 , wherein the resistance element has a section which is in the form of a bar. 
     
     
         5 . The current sensor device as claimed in  claim 3 , wherein the resistance element has at least one bent section. 
     
     
         6 . The current sensor device as claimed in  claim 1 , wherein the resistance element has a section which is bent in a serpentine manner. 
     
     
         7 . The current sensor device as claimed in  claim 2 , wherein the sheet metal element comprises copper. 
     
     
         8 . The current sensor device as claimed in  claim 1 , further comprising an evaluation unit for evaluating the voltage across the resistance element. 
     
     
         9 . The current sensor device as claimed in  claim 1 , further comprising at least one temperature sensor for measuring the temperature at the connection element and/or at the resistance element. 
     
     
         10 . The current sensor device as claimed in  claim 8 , wherein an electrical resistance of the resistance element can be determined depending on the temperature by the evaluation unit. 
     
     
         11 . The current sensor device as claimed in  claim 10 , wherein the determined current value can be corrected by a thermally influenced current value fraction by of the evaluation unit. 
     
     
         12 . A motor vehicle comprising a current sensor device as claimed in  claim 1 . 
     
     
         13 . The current sensor device as claimed in  claim 2 , wherein the resistance element has a cross section which is smaller than the cross section of the connection elements. 
     
     
         14 . The current sensor device as claimed in  claim 4 , wherein the resistance element has at least one bent section.