Production of tetrabasic lead sulfate from solid state reactions for the preparation of active plates to be used in lead-acid batteries
AssigneeGES Technologies IP GmbH
InventorsRicardo Flores-Lira, Sanjuana Garza-De La Garza
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Abstract
The production of tetrabasic lead sulfate by means of solid state reactions at high temperatures allow the formation of powders having a particle size of less than 10 μm. In the methods the chemical reaction that takes place between lead oxide and different sulfated compounds occurs in a single high temperature treatment. The sulfated compounds used in the present invention to produce the tetrabasic lead sulfate are: PbSO4, 3PbO.PbSO4.H2O, H2SO4 and (NH4)2SO4. There are lead-acid battery pastes produced using the tetrabasic lead sulfate made, the lead-acid battery plates made with the pastes, and the lead-acid batteries subsequently made with the plates.
Claims19
A solid state reaction method for the production of tetrabasic lead sulfate by reacting 4PbO and PbSO4, comprising the steps of:
- mixing a stoichiometric mixture of 4PbO and PbSO4;
- heating the stoichiometric mixture of 4PbO and PbSO4 at a temperature between 500 and 700° C. for 3 to 8 hours;
- and
- deagglomerating and sieving resulting tetrabasic lead sulfate.
A method of forming a battery plate comprising:
- mixing a stoichiometric mixture of 4PbO and PbSO4;
- heating the stoichiometric mixture of 4PbO and PbSO4 at a temperature between 500 and 700 ° C. for between 3 and 8 hours to form tetrabasic lead sulfate;
- deagglomerating and sieving the tetrabasic lead sulfate;
- forming a paste using the tetrabasic lead sulfate;
- and
- providing the paste on a battery plate.
A method of produced lead-acid battery, said method comprising:
- providing a battery comprising a plurality of battery plates, the battery plates prepared by a method comprising:
- mixing a stoichiometric mixture of 4PbO and PbSO4;
- heating the stoichiometric mixture at a temperature between 500 and 700° C. for a period of between 3 and 8 hours to form tetrabasic lead sulfate;
- deagglomerating and sieving the tetrabasic lead sulfate;
- forming a paste using the deagglomerated and sieved tetrabasic lead sulfate;
- and
- providing the paste on a battery plate.
Dependencies are inferred from the claim text.