TAILIEUCHUNG - Influence of charge mode on the capacity and cycle life of lead±acid battery negative plates

The effect of fast and three-step charge mode on the capacity and cycle life of lead±acid battery negative plates was investigated using a model mini electrode (ME). It has been found that the charge algorithm exerts a strong effect on the charge acceptance of the negative electrode. In the two-step charging mode I1, j2 with increase of the current at the ®rst step of charge, the capacity of the negative electrode decreases and the cycle life shortens. This phenomenon is reversible as it is probably due to the incomplete reduction of PbSO4 to Pb. The phenomenon is explained. | ELSEVIER Journal of Power Sources 113 2003 355-362 Influence of charge mode on the capacity and cycle life of lead-acid battery negative plates G. Petkova D. Pavlov Central Laboratory of Electrochemical Power Sources Bulgarian Academy of Sciences 1113 Sofia Bulgaria Abstract The effect of fast and three-step charge mode on the capacity and cycle life of lead-acid battery negative plates was investigated using a model mini electrode ME . It has been found that the charge algorithm exerts a strong effect on the charge acceptance of the negative electrode. In the two-step charging mode Z1 2 with increase of the current at the first step of charge the capacity of the negative electrode decreases and the cycle life shortens. This phenomenon is reversible as it is probably due to the incomplete reduction of PbSO4 to Pb. The phenomenon is explained based on the mechanism of the process of reduction of PbSO4. At high initial charge currents the concentration of H2SO4 in the pores of NAM increases which decreases the solubility of PbSO4 crystals and limits the charge acceptance of the negative plate. The higher initial charge current influences markedly the formation of smaller Pb crystals that build up the energetic structure of the negative active material. It is essential that a third step with a small constant current Z3 is added to the charge algorithm. The third step of charge in the 1 2 Z3 charge mode decreases the Ohmic resistance and ensures complete charge of the lead electrode. 2002 Elsevier Science . All rights reserved. Keywords Lead-acid batteries Charging regime Cycle life Lead negative electrode 1. Introduction Fast charging of batteries has become a widely applied technique for improvement of the cycle-life performance of VRLA batteries with PbSnCa grids. The beneficial effect of fast charging on the positive active mass PAM structure and on the cycle life of the positive plates has been the subject of many papers. However the effect of high rate of .

• Điện - Điện tử
• Journal of Power Sources
• chu kỳ tấm pin axít chì
• Influence of charge mode
• công nghệ pin điện tử
• lead acid battery
• Journal of Mechanics
• Influence of heat sources
• Finite channel conjugate natural convection of a power fluid
• Finite channel conjugate natural convection
• The influence of heat sources
• Journal of Automation and Control Engineering
• Frequency regulation in an AC microgrid
• Diverse sources of power
• Intelligent control technique
• Fuzzy gain scheduled proportional integralderivative
• pin axít chì
• Improvements to active material
• VRLA batteries
• Effect of additives
• compressed lead acid batteries
• Effect of Na2SO4 additive
• Electrochemical evaluation of additives
• Improved oxides for production
• leadracid battery plates
• Influence of temperature
• the cycle life of negative plates
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