FIELD: electrical and radio engineering. SUBSTANCE: nonsinusoidal voltage and current applied to battery are recorded and expanded into harmonic Fourier series. Complex resistances of battery for each harmonic, their active and reactive components are found by values of amplitudes and starting phases of harmonics of voltage and current. Due to frequency characteristics of chemical source of electric energy it is possible to know serviceability of energy sources, their technical condition, degree of charging, and to realize synthesis of systems of automatic control by process of charging. EFFECT: increased accuracy of determining the amplitude- and phase-frequency characteristics of all types of storage batteries in wide ranges of frequencies. 2 dwg
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