Abstract: In a state monitoring of a storage battery, accuracy of estimation of the remaining service life of the storage battery can be improved by monitoring the state of the storage battery and distinguishing an initial failure and an accidental failure from degradation over time.

Abstract: In a state monitoring of a storage battery, accuracy of estimation of the remaining service life of the storage battery can be improved by monitoring the state of the storage battery and distinguishing an initial failure and an accidental failure from degradation over time.

Abstract: It is an object of the present invention to provide a lead acid battery which generates a higher power than the conventional lead acid battery does. To this end, the lead acid battery of the present invention is characterized in that electrodes are formed, each of the electrodes having a structure in which a metallic powder is disorderly distributed, the metallic powder being composed of a metallic lead powder or a lead alloy powder containing lead as a main element of composition. In the lead acid battery, a charge collection network of a metallic powder containing lead is formed. As a result, the lead acid battery generates a higher power than the conventional lead acid battery does.

Abstract: In a single plate lead-acid battery of the present invention are respectively formed a positive electrode capacitor layer and a negative electrode capacitor layer on surfaces of a positive electrode plate and a negative electrode plate containing an active substance, and an electric charge is accumulated in the positive electrode capacitor layer and the negative electrode capacitor layer. As a result, the single plate lead-acid battery brings out an output higher than a conventional single plate lead-acid battery.