Battery pack with reduced magnetic field emission

Abstract

Implementations of a battery pack with reduced magnetic field emission are provided. The battery pack is configured to reduce or eliminate the magnetic field normally generated while electrical current is being drawn from cylindrical-steel electrochemical cells (e.g., AA batteries) by a connected electrical device. In some implementations, a battery pack with reduced magnetic field emission comprises two or more electrochemical cells positioned in a coaxial configuration. In this coaxial configuration, the supply path is through the center of each electrochemical cell, and the return path is through a conductive sleeve positioned about each electrochemical cell of the battery pack. In this way, the supply path and the return path are as close as is physically possible, thereby minimizing any magnetic field generated between the conductors (i.e., between the electrochemical cells and their conductive sleeves). An insulating layer of material separates each cylindrical-steel electrochemical cell from the conductive sleeve positioned thereabout.

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         13 . A battery pack with reduced magnetic field emission comprising:
 a first cylindrical-steel electrochemical cell and a conductive sleeve, the conductive sleeve is separated from the first cylindrical-steel electrochemical cell by an insulating layer of material;   a second cylindrical-steel electrochemical cell and a conductive sleeve, the conductive sleeve is separated from the second cylindrical-steel electrochemical cell by an insulating layer of material;   wherein the first cylindrical-steel electrochemical cell and the second cylindrical-steel electrochemical cell are positioned in a coaxial configuration thereby positioning a positive terminal of the first cylindrical-steel electrochemical cell against a negative terminal of the second cylindrical-steel electrochemical cell; and   wherein the conductive sleeve of the first cylindrical-steel electrochemical cell is conductively connected on one end thereof to the conductive sleeve of the second cylindrical-steel electrochemical cell, together the conductive sleeves form a return path for electrical current being drawn from the cylindrical-steel electrochemical cells by a connected device.   
     
     
         14 . The battery pack of  claim 13 , wherein each conductive sleeve is a hollow cylinder configured to fit about at least one of the cylindrical-steel electrochemical cells. 
     
     
         15 . The battery pack of  claim 13 , wherein the layer of insulating material positioned between each cylindrical-steel electrochemical cell and the conductive sleeve thereof is fabricated from polyimide.