Method and apparatus for battery testing

Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters

Reexamination Certificate

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C324S426000

Reexamination Certificate

active

07019542

ABSTRACT:
A method for testing electrochemical cells applies to a portion of a cycle of a low-frequency excitation waveform to a cell under test while maintaining an amplitude of the excitation waveform below a threshold value. In some cases a quarter cycle of the excitation waveform is used. Phase an amplitude of a response to the excitation waveform may be determined by applying formulae based on geometry.

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Noworolski, Z. et al.,Can a battery ohmic tester distinguish a good cell from a pool of better ones?, Telecommunications Energy Conference 2002.
Feder, D.O.,Performance measurements and reliability of VRLA batteries, Proceedings of the 1995 INTELEC Conference.

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