The full charge capacity correction circuit, charging system, battery pack, and the full charge capacity correction method

摘要

A kind of full power correcting circuit includes: that integration value flows through secondary cell, thus calculating integral value; First and second estimation devices are for estimating the ratio between reservoir storage and excavated volume secondary cell as the ratio between the first and second reservoir storages and excavated volume; Difference between difference on the basis of a kind of full capacity value of that estimation secondary cell of full power correction unit between integration value and the ratio between the first and second reservoir storages and excavated volume and 1 and using the fully charged capability value of estimation as new full capacity value, to full capacity value, difference integration value is integrated value integration interval by arriving by the first estimation unit estimation the ratio between the second reservoir storage and excavated volume from estimation the ratio between the first reservoir storage and excavated volume by second unit in integrated unit; With a screen open ratio estimation device, for being satisfied when open circuit voltage conditions, estimate terminal voltage of the ratio between reservoir storage and the excavated volume of secondary cell based on secondary cell, it is under determining this situation that open circuit voltage conditions, which are based on making current flow through secondary cell to become smaller than open decision content in advance, and open-circuit voltage can be obtained as the secondary cell of terminal.