Patent ID: 7642001
Filing Date: 2010-01-05
Classification: H01M,Y02E,Y02P

Abstract:
1. A secondary-battery control method comprising the steps of: providing a secondary battery comprising at least one positive electrode and at least one negative electrode which is made of a material capable of being doped or undoped with lithium, and a liquid or gel electrolyte containing lithium salt and an organic solvent, the battery being at least 30 Wh in energy capacity and at least 180 Wh/l in volume energy density and having a flat shape with a thickness of less than 12 mm and not less than 2 mm; measuring operational parameters at different portions of the battery; and controlling operations of the battery based on the results of the measurements, wherein the operational parameters to be measured include at least one of voltage, current, temperature, internal resistance of the secondary battery, and pressure, wherein said operational parameters are to be measured at least two points in the battery and wherein charge and discharge conditions and resting conditions of the battery, battery temperatures adjusted by heating or cooling, and pressure against the battery case are controlled based on a comparison between the results of the measurements at least two points in the battery to each other.