Patent ID: 11084385

Abstract:
In an existing permissible current computation algorithm, an excessive current is caused to flow by controlling the battery having a steep change region in the battery characteristic. On the other hand, when the current is reduced and the output is suppressed, the battery performance cannot be sufficiently utilized. Moreover, with countermeasures to increase the number of data points, the amount of data increases and thus can not be installed in the microcomputer. A battery control device that computes a permissible current of a battery having a battery characteristic non-steep change region having a small battery characteristic change and a battery characteristic steep change region having a battery characteristic change greater than in the battery characteristic non-steep change region, in which in a case where the battery enters the battery characteristic steep change region after a predetermined time from a present state, a battery characteristic value is calculated by using an absolute value of a slope greater than an absolute value of a slope in the present battery characteristic.