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Caracterização dos elementos das baterias de chumbo-ácido em fase de fabrico – efeitos no desempenho das baterias
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Num mundo cada vez mais tecnológico e informatizado, o uso de baterias tem-se
tornado cada vez mais essencial e imperativo. Desta forma e em colaboração com a empresa
Exide Technologies, desenvolveu-se um estudo destinado a caracterizar os elementos básicos
das baterias de chumbo-ácido numa fase inicial de fabrico. Para tal, realizou-se um ensaio de
potencial elétrico em baterias não formadas, o qual por limitações dos equipamentos
disponíveis não foi possível concluir. Durante a preparação desse ensaio, suspeitou-se da
existência de uma relação entre a resistência elétrica e a compressão dos elementos das
baterias. Assim, para analisar esse fenómeno desenvolveu-se um ensaio de compressão desses
elementos e, complementarmente, realizou-se um levantamento das resistências na linha de
produção. Na continuação do estudo aplicou-se a técnica de espetroscopia de impedância
eletroquímica em duas baterias não formadas, com vista à modelação do seu comportamento
elétrico considerando os circuitos equivalentes reportados na literatura.
Do trabalho desenvolvido resultou um melhor conhecimento dos elementos das
baterias de chumbo-ácido, abrindo caminho para a utilização da técnica de espetroscopia de
impedância na obtenção de características das baterias potencialmente correlacionadas com
o seu desempenho futuro.
In an increasingly technological and computerized world, batteries have become indis- pensable. Accordingly, and in collaboration with Exide Technologies, this study was developed with the objective of characterizing the fundamental elements of lead–acid batteries at an early stage of the manufacturing process. To this end, an electrical potential test was performed on unformed batteries, which due to limitations of the available equipment, it was not possible to complete. During the preparation of this experiment, a potential relationship between electrical resistance and the compression of battery elements was identified. Consequently, a compres- sion test of these elements was developed to investigate this phenomenon, complemented by a survey of electrical resistance values along the production line. In a subsequent phase of the study, electrochemical impedance spectroscopy was applied to two unformed batteries to model their electrical behavior using equivalent circuit models reported in the literature. The results of this work provided an improved understanding of the constituent elements of lead–acid batteries, thereby paving the way for the application of electrochemical imped- ance spectroscopy to obtain battery characteristics potentially correlated with their future per- formance.
In an increasingly technological and computerized world, batteries have become indis- pensable. Accordingly, and in collaboration with Exide Technologies, this study was developed with the objective of characterizing the fundamental elements of lead–acid batteries at an early stage of the manufacturing process. To this end, an electrical potential test was performed on unformed batteries, which due to limitations of the available equipment, it was not possible to complete. During the preparation of this experiment, a potential relationship between electrical resistance and the compression of battery elements was identified. Consequently, a compres- sion test of these elements was developed to investigate this phenomenon, complemented by a survey of electrical resistance values along the production line. In a subsequent phase of the study, electrochemical impedance spectroscopy was applied to two unformed batteries to model their electrical behavior using equivalent circuit models reported in the literature. The results of this work provided an improved understanding of the constituent elements of lead–acid batteries, thereby paving the way for the application of electrochemical imped- ance spectroscopy to obtain battery characteristics potentially correlated with their future per- formance.
Descrição
Palavras-chave
Acumulador Bateria Capacidade Chumbo-Ácido Impedância Resistência elétrica