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Amélioration du comportement électrochimique des batteries plomb-acide à usage photovoltaïque

Abstract : In an isolated photovoltaic system, the accumulator is the weak point of the device. His charge capacity is closely related to the conduction properties of the grid/PAM interface, interface which evolves according to the state of charge. The positives grids, made with a Pb-Ca-Sn alloy, play the role of both collector of current and support of the positive active mass. At ambient temperature, these alloys are prone to metallurgical transformation, which is followed by a drop of the mechanical properties and by a reduction of the corrosion resistance whatever the charge conditions are. The use of a heat treatment makes it possible to durably maintain alloy in the state in which the best behaviors are observed. The addition of tin in the alloy, associated to the heat treatment, allows to improve the properties of material more. Moreover the tin, like silver and rare earth, plays an essential role in the formation and the growth of the lead oxides, but on the properties of adherence of the corrosion layer during the tests of cycling too.
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Submitted on : Thursday, March 29, 2018 - 10:45:48 AM
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Gwenaëlle Bourguignon Toussaint. Amélioration du comportement électrochimique des batteries plomb-acide à usage photovoltaïque. Autre [cond-mat.other]. Université Henri Poincaré - Nancy 1, 2003. Français. ⟨NNT : 2003NAN10162⟩. ⟨tel-01746835⟩



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