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

摘要

A broad-band technique for reducing the distributed inductance of a four-conductor Kelvin cable is disclosed. A special inductance-canceling cable section is connected in tandem with the cable section contacting the cell/battery. Connections between the two cable sections are transposed such that conductors in each conductor pair of the canceling section connect to current-carrying and voltage-sensing conductors from different conductor pairs in the contacting section. The canceling section thereby exhibits a distributed negative mutual inductance between its current-carrying and voltage-sensing conductors that can effectively cancel the distributed positive mutual inductance introduced by the contacting section. In one embodiment, conductor pairs comprise pairs of insulated wires which may be twisted together. In other disclosed embodiments, conductor pairs comprise shielded coaxial cables.