US 7,742,279 B2 · Energy conversion device

Abstract

A secondary battery comprises a single-plate lead acid battery (Va), a positive electrode capacitor layer and a negative electrode capacitor layer, which are formed on the respective surfaces of a positive electrode plate, and a negative electrode plate. Each of the positive electrode plate and negative electrode plate contains an active material, to have a configuration in which activated carbon has a concentration gradient. The electronic resistance between a collector terminal and the center of a portion where activated carbon is present at a high concentration is lower than the electronic resistance between the collector terminal and the center of a portion where activated carbon is present at a low concentration. In the single-plate lead acid battery, charges are accumulated in the positive electrode capacitor layer and in the negative electrode capacitor layer.

Claims9

Dependent claims

An energy conversion device comprising:

at least a pair of electrodes at least one of which contains a capacitor material;
and an electrolyte having ion conductivity and electron insulation, the energy conversion device using an electric double layer formed at an interface between the capacitor material and the electrolyte to store energy, wherein
a layer of the capacitor material is formed to be closer to a collector terminal than an active material layer of each of the electrodes such that an electronic resistance A between the collector terminal and a center of gravity of the capacitor material layer in the electrode is lower than an electronic resistance B between the collector terminal and a center of gravity of a surface of the active material layer of the electrode.

Dependencies are inferred from the claim text.

Energy conversion device

Life of this patent

Energy conversion device

Life of this patent

Abstract

Claims9