METHOD FOR DETERMINATION OF DISCHARGE DEGREE FOR LEAD-ACID BATTERY Russian patent published in 2012 - IPC H01M10/06 H01M10/42 

FIELD: electricity.

SUBSTANCE: method for determination of discharge degree for lead-acid battery (LAB) consists in the following: before tests using empirical formula, which sets functional relation of LAB discharge degree ΔC on change of electrolyte density Δρ at discharge, value of specific discharge index ΔC_sp is determined with use of electrolyte temperature t, rated LAB capacitance C_r ΔC=f(Δρ, ΔC_sp, t, C_r), (1); during tests electrolyte density ρ and temperature t are measured and using formula (1) degree of LAB discharge is determined; additionally before tests to determine value of specific discharge index empiric formula is used, which considers individual characteristics of LAB and sets dependency of its specific discharge index ΔC_sp on value of theoretical specific discharge index of LAB ΔC_{sp min} - ΔC_sp=ΔC_{sp min}xKv (2); correction factor Kv for individual characteristics of tested LAB sets relation between values of actual specific volume of electrolyte V_{el sp} and theoretic minimum specific volume of electrolyte V_{sp min}. Kv=V_{el sp} /V_{sp min} (3); using these values and functional relation (1) discharge degree ΔC is determined for LAB.

EFFECT: improvement in accuracy of discharge degree determination for operated lead-acid batteries.

4 dwg, 1 ex