METHOD FOR DETERMINING REMAINING CAPACITY OF LEAD ACCUMULATOR Russian patent published in 2007 - IPC G01R31/36 H01M10/42 

FIELD: measuring equipment.

SUBSTANCE: preliminarily for appropriate type of accumulators an empiric formula is determined, determining dependency of full capacity of lead accumulator on discharge current I_dis, temperature t and electrolyte concentration d. On basis of individually measured during receiving-transferring tests of certain accumulator battery, values of capacitors in two discharge modes, determined are correction coefficients and precise values of full capacity, appropriate for discharge currents related to marked sub-ranges of current. During discharge, discharge vessel of accumulator battery is determined continuously, by integrating discharge current C_j,p = Σ(I_j,p·Δt), and each increment thereof is added to content of j-numbered cell, where j - number of sub-range, to which current discharge current I_jp is related. Computation of remaining capacity at present discharge current, related to n sub-range, is performed by modifying all discharge capacitors, received in various sub-ranges, to n sub-range, adding modified discharge capacitors and subtracting that total from precise value of full capacity, appropriate for n-numbered sub-range.

EFFECT: increased precision.