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;
generating lead ions in an amount sufficient to enable movement of lead ions from the negative active material-filled plate into the carbon mixture-coated layer by performing, before charging, at least one of a) soaking treatment of the plate in an electrolyte solution, and b) discharging treatment of the plate; and
performing a 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.
9 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; generating lead ions in an amount sufficient to enable movement of lead ions from the negative active material-filled plate into the carbon mixture-coated layer by performing, before charging, at least one of a) soaking treatment of the plate in an electrolyte solution, and b) discharging treatment of the plate; and performing a 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