Abstract: Provided is a charger with a battery diagnosis function and a control method thereof. The charger with a battery diagnosis function includes a DC-DC converter configured to operate in a charging mode to charge a battery or to operate in a diagnosing mode to apply a perturbation voltage to the battery when the battery is fully charged, and a digital signal processor configured to calculate an equivalent circuit model parameter of the battery according to an output response of the battery with respect to the perturbation voltage, to calculate a charging/discharging frequency of the battery by using an ohmic resistance value among the equivalent circuit model parameter of the battery, and to calculate a residual equivalent capacity of the battery by using the charging/discharging frequency of the battery.

Abstract: Provided is a charger with a battery diagnosis function and a control method thereof. The charger with a battery diagnosis function includes a DC-DC converter configured to operate in a charging mode to charge a battery or to operate in a diagnosing mode to apply a perturbation voltage to the battery when the battery is fully charged, and a digital signal processor configured to calculate an equivalent circuit model parameter of the battery according to an output response of the battery with respect to the perturbation voltage, to calculate a charging/discharging frequency of the battery by using an ohmic resistance value among the equivalent circuit model parameter of the battery, and to calculate a residual equivalent capacity of the battery by using the charging/discharging frequency of the battery.

Abstract: Disclosed herein is a shoelace tightening device for making it easier for the wearer to tie shoelaces of shoelace-type shoes, including sports shoes. The shoelace tightening structure comprises a tightening lace, a pair of locking devices, and a shoelace. The tightening lace is successively threaded upward at both ends thereof through first and second row loops arranged in parallel along eyelet lines defined at left and right vamps of a shoe. The locking devices are fixed at opposite side positions above the eyelet lines. Through the locking devices are inserted both the ends of the tightening lace, respectively. The shoelace is tied on the tightening lace as both ends thereof alternately pass through portions of the tightening lace between the respective first row loops, and portions of the tightening lace between the respective second row loops so as to crisscross each other.