Lg Chem, Ltd

Lg Energy Solution, Ltd.

Yo Jin Kim

Seung Don Choi

Han Ho Lee

Sung Joon Park

Nan Ji Yun

Dal Mo Kang

Min Chul Jang

In Cheol Shin

Dae Sik Choi

Hey Woong Park

You Rim Yoon

Sang Yoon Jeong

Seung Su Cho

Yong Kyu Ju

Chang Moon Jeong

Seung-Taek Hong

Ho Jin Jeon

Seung Taek Hong

Jun Seok Choi

Soul Gie Hong

Chang Ho Kim

Jin Ook Suh

Hui Kyoung Kim

Min Won Suh

Sae Young Oh

An apparatus for manufacturing a pouch includes a die in which a pair of forming grooves are formed with a partition wall therebetween in a top surface thereof; and a pair of punches disposed above the die configured to form a pair of accommodation parts in a pouch film while being respectively inserted into the pair of forming grooves in a state of pressing the pouch film, wherein a pressing surface of each of the punches, which is configured to press the pouch film, has an inclined angle that is inclined upward from one end thereof disposed at a side of the partition wall toward an opposite end thereof.

Apparatus for manufacturing pouch

Provided are a secondary battery, a battery module, and a battery pack, which have improved safety. Particularly, since a bulletproof material is disposed on the inside and/or the outside of an exterior part, even when a conductive needle-shaped member penetrates a secondary battery, heating, burning, discharge of evaporated electrolyte, and electrical contact between the needle-shaped member and an electrode can be prevented, thereby improving safety of the secondary battery, the battery module, and the battery pack.

Secondary battery having improved safety

Provided is a secondary battery comprising a separator having an inorganic layer wherein active sites of inorganic particles in the inorganic layer are modified into non-reactive sites. Use of the separator leads to improvements in wettability of an electrolyte and thermoelectric stability and storage characteristics of the secondary battery. Provided is also a method of manufacturing the same secondary battery.

Secondary battery with improved storage characteristics and method for manufacturing the same

Provided are an electrolyte which may prevent the degradation of the battery performance by including a functional group which can react with a side reaction site which is responsible for decomposition of negative electrode material components and a functional group which can react with moisture which is responsible for decomposition of positive electrode material components in an electrolyte of the battery to ensure the stability of the battery at high temperatures, and a secondary battery manufactured by adding the same. The present invention may employ a compound including a functional group which can react with a side reaction site of a negative electrode material and a functional group which can react with moisture to maximize the improvement of the storage performance of a secondary battery at high temperatures.

Electrolyte, and secondary battery comprising same

Provided is a positive electrode active material. The positive electrode active material includes: a small-diameter active material having an average particle diameter of about 0.5 &#x3bc;m and a maximum particle diameter of less than about 1 &#x3bc;m; and a large-diameter active material having an average particle diameter of about 5 &#x3bc;m to about 20 &#x3bc;m and a maximum particle diameter of less than about 100 &#x3bc;m.

Positive electrode active material, and positive electrode and lithium secondary battery including the same

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Daejeon, South Korea

Yo Jin Kim