| 摘要 |
PROBLEM TO BE SOLVED: To accurately detect the residual capacity of a battery, etc. for supplying start-up electric power to an engine mounted on a vehicle by suppressing the reduction of accuracy due to an error. SOLUTION: A detection method for the residual capacity of a battery includes a first residual capacity detection process for detecting the residual capacity based on the terminal voltage of the battery and the influence of a diffusion polarization and a stratified polarization, a second residual capacity detection process for detecting the residual capacity by integrating charge and discharge currents flowing in and out of the battery, an error calculation process for calculating the error of the residual capacity detected in the first residual capacity detection process and the error of the residual capacity detected in the second residual capacity detection process, and a residual capacity determination process for comparing the errors calculated in the calculation process, to determine the residual capacity in the residual capacity detection process smaller in error as the residual capacity of the battery. COPYRIGHT: (C)2012,JPO&INPIT |
