Process for producing negative plate for lead storage battery, and lead storage battery
First Claim
1. A method for producing a negative plate for use in a lead-acid battery, comprising the steps of:
- forming a coating layer of a carbon mixture at least in a part of a surface of a negative active material-filled plate, the carbon mixture being prepared by mixing two kinds of carbon materials consisting of a first carbon material having conductive properties and a second carbon material having capacitive capacitance and/or pseudo capacitive capacitance and a binding agent;
(i) performing, before an initial charge treatment, a soaking treatment of the plate in an electrolyte solution for at least about one hour after the electrolyte solution is poured or impregnated into the plate, to generate lead ions in an amount sufficient to enable movement of lead ions from the negative active material in the negative plate into the carbon mixture-coated layer; and
(ii) performing the initial charge treatment to precipitate lead so that the carbon mixture-coated layer and the negative active material-filled plate are connected and integrated by the precipitated lead at the region of the interface between the carbon mixture-coated layer and the negative active material-filled plate.
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Accused Products
Abstract
To provide a method for producing a lead-acid battery negative plate for use in a storage battery which provides improved deteriorated rapid discharge characteristics by preventing an interfacial separation between a negative active material-filled plate and a carbon mixture-coated layer, which is a problem in a negative plate having such a configuration that the carbon mixture coated layer is formed on the surface of the negative active material-filled plate.
A coating layer of a carbon mixture is formed at least in a part of a surface of a negative active material-filled plate. The carbon mixture is prepared by mixing two kinds of carbon materials consisting of a first carbon material having conductive properties and a second carbon material having capacitive capacitance and/or pseudo capacitive capacitance and a binding agent. Subsequently, a sufficient amount of lead ions are generated enough to be moved from the negative active material-filled plate into the carbon mixture-coated layer. Thereafter, a formation treatment or an initial charge treatment is performed to precipitate lead so that the carbon mixture-coated layer and the negative plate are connected and integrated, at least in a part of a respective interfacial surface thereof, by the precipitated lead.
191 Citations
14 Claims
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1. A method for producing a negative plate for use in a lead-acid battery, comprising the steps of:
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forming a coating layer of a carbon mixture at least in a part of a surface of a negative active material-filled plate, the carbon mixture being prepared by mixing two kinds of carbon materials consisting of a first carbon material having conductive properties and a second carbon material having capacitive capacitance and/or pseudo capacitive capacitance and a binding agent; (i) performing, before an initial charge treatment, a soaking treatment of the plate in an electrolyte solution for at least about one hour after the electrolyte solution is poured or impregnated into the plate, to generate lead ions in an amount sufficient to enable movement of lead ions from the negative active material in the negative plate into the carbon mixture-coated layer; and (ii) performing the initial charge treatment to precipitate lead so that the carbon mixture-coated layer and the negative active material-filled plate are connected and integrated by the precipitated lead at the region of the interface between the carbon mixture-coated layer and the negative active material-filled plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification