Charging method of secondary battery and device therefor

Abstract

PURPOSE: A method and an apparatus are provided to avoid over charge and reduce an overall charge time by using a simple algorithm. CONSTITUTION: A method comprises a step of forming a charge current into charge pulses having the same pulse width; a step of determining a charge pulse cycle on the basis of the internal impedance value of a secondary battery(1); and a step of stopping the pulse charging in a predetermined condition, supplying the charge pulse to the secondary battery until it has reached the predetermined condition, and supplying a discharge current by the same pulse waveform to the secondary battery in the early stage of a charge pause section which is an interval to the subsequent charge pulse supply.

Description

technical field [0001] The present invention relates to a method for charging a secondary battery in which a charging current Ic of a pulse waveform is applied when charging a secondary battery and a device using the method, and particularly relates to a secondary battery capable of detecting a stable full charge in a short time Charging method and device using the same. Background technique [0002] In the past, for such secondary battery charging devices, such as figure 1 As shown, when the secondary battery 1 is charged by the charger 2, the discharge control unit 10 is charged between the two. In some cases, the charging and discharging control unit 10 is placed inside the charger 2 . [0003] In addition, the secondary battery 1 used as a power source of a portable device includes, for example, an alkaline battery, a nickel-cadmium battery, etc., and when these batteries are repeatedly charged and discharged at a shallow depth of discharge, it is easy to generate a vo...

AI Technical Summary

Problems solved by technology

That is, the second problem that needs to shorten the period until the end of charging occurs

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