Lg Chem, Ltd

Lg Energy Solution, Ltd.

Korea Research Institute of Chemical Technology

So Hee Kim

Joon Sung Bae

Nak Gi Sung

Jong Chan Won

Jinsoo Kim

Ji Sang Yoo

Mihye Yi

Yun Ho Kim

Jae Won Ka

Sung Mi Yoo

Kwang Ho Kim

Chi Jang Moon

Kwang Suk Jang

You Na Moon

Shin Young Park

A secondary battery charging method includes a step for introducing a plurality of battery cells onto an activation tray and CC-charging the battery cells; and a step for connecting the plurality of battery cells in parallel. The charging method shortens the time typically required for CV-charging by connecting battery cells in parallel after CC-charging, thus having the effect of replacing CV-charging.

Method of battery cell activation using activation tray

A secondary battery charging method that shortens charging time includes a step for introducing a plurality of battery cells onto an activation tray and CC-charging the battery cells; and a step for connecting the plurality of battery cells in parallel. The charging method according to the present invention shortens the time typically required for CV-charging by connecting battery cells in parallel after CC-charging, thus having the effect of replacing CV-charging.

Secondary battery charging method that shortens charging time

A method and system for predicting the time required for low voltage expression of a secondary battery, including (a) obtaining a leakage current by inputting a voltage of a battery cell of the secondary battery, measuring a freezing resistance of a battery cell, and dividing an input voltage by a measured freezing resistance, (b) obtaining a discharge capacity difference by setting a reference value of a voltage drop for selecting a low voltage defect and obtaining a discharge capacity difference between the input voltage and a voltage dropped therefrom by the reference value, and (c) dividing the discharge capacity difference by the leakage current to thereby calculate a time required for low voltage expression.

Method and system for predicting the time required for low voltage expression of a secondary battery, and aging method of the secondary battery using the same

A method for calculating a leakage current of a precipitate by using a voltage drop amount result measured in an aging process according to a discharge voltage of a normal cell and a profile according to a discharge voltage of a normal cell and directly presenting a low voltage expression level based thereon.

Method and system for calculating low voltage expression level of a secondary battery

The present invention relates to a composition for an insulator of a thin film transistor, an insulator and an organic thin film transistor comprising the same. The insulator of a thin film transistor prepared with the composition of the present invention displays an excellent permittivity along with a low surface energy, and the organic thin film transistor comprising the same displays an improved organic semiconductor morphology formed on the top surface of the insulator, so that it can bring the effect of reducing leakage current density, improving charge carrier mobility, and improving current on/off ratio.

Composition for insulator of thin film transistor, insulator and organic thin film transistor prepared thereby

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Daejeon, South Korea

So Hee Kim