Process for the production of battery paste
AssigneeGlobe-Union Inc.
InventorsCoonen A. Matthew, Ralph A. Petersen, Conrad E. Weinlein
Life of this patent
Estimating the term…
Abstract
A process for making a battery paste includes steps of forming an active material in an aqueous slurry, then dewatering the slurry to form a battery paste. In one described embodiment, a slurry containing one or more basic lead sulfates suitable for use as the active material in lead-acid battery electrodes is formed in a continuously stirred tank reactor (36). The slurry is withdrawn from the reactor (36) and fed to a belt press (67) which reduces the moisture content of the slurry to the desired level. Battery pastes produced according to the invention may be fed continuously to a paster (89) for mass production of positive and negative battery plates from grids (91).
Claims19
A process for making a lead-acid battery paste, comprising the steps of:
- forming an aqueous slurry in a reactor under conditions effective to react lead oxide with sulfuric acid to form a lead sulfate material in the presence of an excess amount of water;
- withdrawing a portion of the slurry from the reactor;
- directly reducing the moisture content of the portion withdrawn to form the battery paste;
- and
- adding additional water, sulfuric acid and lead oxide to the reactor in amounts as needed to maintain the slurry.
A process for making a lead-acid battery paste, comprising the steps of:
- forming an aqueous slurry in a reactor under conditions effective to react lead oxide with sulfuric acid to form a lead sulfate material in the presence of an excess amount of water;
- withdrawing at least a portion of the slurry from the reactor;
- then press-filtering the slurry prior to application to a battery grid to reduce the moisture content of the portion withdrawn to form the battery paste.
A process for making a lead-acid battery paste, comprising the steps of:
- forming an aqueous slurry in a reactor under conditions effective to react lead oxide with sulfuric acid to form a lead sulfate material in the presence of an excess amount of water;
- withdrawing at least a portion of the slurry from the reactor;
- depositing the withdrawn slurry on the upper surface of a microporous first conveyor belt;
- vacuum filtering water from the slurry through the first conveyor belt;
- conveying the slurry on the first conveyor belt beneath a second conveyor belt disposed above the first conveyor belt in parallel therewith;
- press-filtering the slurry between the first and second conveyor belts to form the paste;
- and
- discharging the paste from the conveyor belts.
Dependencies are inferred from the claim text.