Lg Energy Solution, Ltd.

Lg Chem, Ltd

In Young Cha

Joon Sung Bae

Sung Hoon Yu

Nak Gi Sung

Gyu Ok Hwang

Ju Kyung Shin

Seung Youn Choi

Joon Sup Kang

The present invention relates to a method for activating a secondary battery. The present invention comprises: a primary charging step of charging a secondary battery including a positive electrode, a negative electrode, a separator, and an electrolyte; a room temperature-aging step of storing, at a room temperature, the secondary battery that has undergone the primary charging step; and a high temperature-aging step of storing, at a high temperature, the secondary battery that has undergone the room temperature-aging step, wherein charging/discharging is performed by alternately applying + current and − current to the secondary battery at the end of the primary charging step. The method for activating a secondary battery according to the present invention includes alternately applying + current and − current to the secondary battery at the end of the primary charging step to stabilize an SEI film, thereby shortening a following-up aging time.

Method for activating secondary battery

A method for manufacturing a secondary battery includes accommodating an electrode assembly in a battery case including an accommodation part and a gas pocket part connected to the accommodation part to collect a gas generated in the accommodation part, performing sealing along an outer circumferential surface of the battery case except for an end of the gas pocket part, injecting an electrolyte into the accommodation part through the end of the gas pocket part, performing double sealing on the end of the gas pocket part so that a first sealing part is formed at a side closer to the accommodation part, and a second sealing part is formed at a side that is farther from the accommodation part, removing a portion, on which the second sealing part is formed, from the battery case, and applying electricity to the electrode assembly to charge the secondary battery.

Method for manufacturing secondary battery and secondary battery

A jig for pressing a gas analysis monocell according to the present invention comprises: a first plate and a second plate which face each other with a monocell therebetween; a first auxiliary pad positioned between the first plate and the monocell; and a second auxiliary pad positioned between the second plate and the monocell, wherein the first plate and the second plate are formed of a thermosetting resin. When analyzing a gas generated from the monocell during a primary charge, the jig for pressing the monocell according to the present invention presses the thin monocell to prevent a gap from forming between electrodes due to the primary charge, and thus has an effect of deriving more reliable analysis results.

Jig for pressing gas analysis monocell, and gas analysis device including same

Growing community of inventors

Daejeon, South Korea

In Young Cha