Patent UA-82129-C2 (UA)
Title: Electric method for control of technical condition of lead-acid accumulator batteries
Inventor: DZENZERSKYI VIKTOR OLEKSANDROVYCH
IPC: G01R31/36
Filed: 2006-05-03
Abstract: Electric method for control of technical condition of accumulators and accumulator batteries relates to electro-technical industry, to production of lead-acid accumulator and accumulator batteries. At electric control of accumulator batteries implemented at temperature of electrolyte 18-27°С, one first determines densityof electrolyte in each accumulator, after that one determines voltage of open circuit Uof battery and voltage Uof open circuit at each of accumulators, one determines control accumulator with smallest voltage of open circuit with giving to it number (1,1), after that one performs charging of accumulators of accumulator battery with direct current equal to 0,05-0,5 of rated capacity Cof battery during 20-50 s, in process of charging one determines charge voltage Uof battery and charge voltage Uat each of accumulators, one determines control accumulator with smallest charge voltage with attribution of number (2,1) to it and control accumulator with largest charge voltage with attribution of number (2,2) to it, then one performs discharge in two stages, at first stage current value is equal to 0,05-0,3 of nominal capacity Cof battery, duration of discharge is 20-50 s. In process of discharge one determines discharge voltage Uof battery and discharge voltage Uat each of accumulators, one determines control accumulator with smallest discharge voltage with attribution of number (3,1) to it, at second stage of discharge current value is equal to 0,5-10 parts of nominal capacity Cof battery, duration of discharge is equal to 5-15 s, in process of discharge one determines discharge voltage Uof battery and discharge voltage Uat each of accumulators, one calculates average value of discharge voltage UFor all the accumulators, with determination of control accumulator with smallest discharge voltage U, with attribution of number (4,1) to it, then one determines type of defect by algorithm that follows. In the case of same low densities of electrolyte at all accumulators of battery and same low voltages of open circuit, charge and discharge voltages, one diagnoses low level of charging for all the accumulators in battery with absence of other defects; in the case of control accumulators with numbers (1,1), (2,1), (3,1) and (4,1) being that very accumulator in which density of electrolyteis decreased compared to other accumulators, one diagnoses short circuit of electrodes in that accumulator; in the case of control accumulators with numbers (1,1), (2,2), (3,1) and (4,1) being that very accumulator in which density of electrolyteis decreased compared to other accumulators one diagnoses passivation (sulfatation) of electrodes in that accumulator, at that at higher arithmetic difference (U-U) for such accumulator higher is the level of its passivation (sulfatation(); if charge voltage Uof the battery is smaller than sum of charge voltages Uand discharge voltage Usmaller than sum of discharge voltages Uof accumulators one diagnoses defect of current-conducting parts. The method for electric method for control of technical condition proposed gives possibility of effective and quick screening of defect accumulators of battery and of determination of defect type.