Broad-band low-inductance cables for making kelvin connections to electrochemical cells and batteries

  • US 20060017447A1
  • Filed: 07/22/2004
  • Published: 01/26/2006
  • Est. Priority Date: 07/22/2004
  • Status: Active Grant
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First Claim
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1. Apparatus employing time-varying signals to test an electrochemical cell or battery comprising:

  • measuring circuitry adapted to couple to said cell or battery with separate current-carrying and voltage-sensing conductors, a contacting cable section comprising first and second conductor pairs, said first conductor pair contacting a first terminal of said cell or battery with a first current-carrying conductor and a first voltage-sensing conductor, said second conductor pair contacting a second terminal of said cell or battery with a second current-carrying conductor and a second voltage-sensing conductor, said contacting cable section characterized by positive mutual inductance coupling between its current-carrying and voltage-sensing conductors; and

    , a canceling cable section comprising third and fourth conductor pairs interposed between said contacting cable section and said measuring circuitry, said third conductor pair comprising a third current-carrying conductor and a third voltage-sensing conductor and said fourth conductor pair comprising a fourth current-carrying conductor and a fourth voltage-sensing conductor, said third and fourth current-carrying conductors adapted to couple current-carrying conductors of said contacting cable section to current carrying conductors of said measuring circuitry and said third and fourth voltage-sensing conductors adapted to couple voltage sensing conductors of said contacting cable section to voltage-sensing conductors of said measuring circuitry, said canceling cable section characterized by distributed negative mutual inductance coupling between its current-carrying and voltage-sensing conductors.

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