Lg Energy Solution, Ltd.

Korea Advanced Institute of Science and Technology

Jin Woo Heo

Joon Sung Bae

Hyo Jin Park

Suk Hyun Hong

Beom Koon Lee

Dong Hun Bae

Dae Bong Lim

Sunghoon Hong

Ho Jung Lee

Changheui Jang

Hyunmyung Kim

Chaewon Kim

Gokul Obulan Subramanian

The present invention is a method for manufacturing a secondary battery. An electrode assembly and an electrolyte are accommodated into a body of a battery case. The body of the battery case has an accommodation part and a gas pocket part, and a passage that extends from the accommodation part to the outside discharges an internal gas from the accommodation part through the gas pocket part. The battery case is seated in a seating step on a support block, which has an inclined part on a side surface thereof, to support the battery case. The body is pressed to discharge a gas accommodated in the accommodation part through the gas pocket part in the battery case. This method allows easy discharging of internal gas while reducing discharge of the electrolyte with the gas.

Method for manufacturing secondary battery

The present disclosure relates to a high-strength Fe&#x2014;Cr&#x2014;Al&#x2014;Ni multiplex stainless steel and a manufacturing method therefor. The multiplex stainless steel comprises 35 to 67 wt % of iron (Fe), 13 to 30 wt % of chrome (Cr), 15 to 30 wt % of nickel (Ni), and 5 to 15 wt % of aluminum (Al) and has a multiplex structure in which an austenite phase accounting for high ductility, a ferrite phase accounting for high strength, and an NiAl(B2) phase providing both strength and high-temperature steam oxidation resistance, exist in combination. The multiplex stainless steel can secure necessary fabricability and mechanical strength even if for/in a thin state, can maintain integrity as a structural member in a normal operation condition of a light-water reactor thanks to the formation of a chrome oxide layer thereon, and can form a stable oxide layer including alumina under a high-temperature steam environment, which is plausible in a high-temperature nuclear accident, thereby providing exceptionally improved resistance to serious accidents.

High-strength Fe&#x2014;Cr&#x2014;Ni&#x2014;Al multiplex stainless steel and manufacturing method therefor

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Daejeon, South Korea

Jin Woo Heo